diff --git a/backend/app/http/tenant/dto/tenant_user_admin.go b/backend/app/http/tenant/dto/tenant_user_admin.go
new file mode 100644
index 0000000..7e53649
--- /dev/null
+++ b/backend/app/http/tenant/dto/tenant_user_admin.go
@@ -0,0 +1,26 @@
+package dto
+
+import (
+	"quyun/v2/app/requests"
+	"quyun/v2/database/models"
+)
+
+// AdminTenantUserJoinResponse 返回租户管理员添加成员后的结果。
+type AdminTenantUserJoinResponse struct {
+	// TenantUser 租户成员关系记录。
+	TenantUser *models.TenantUser `json:"tenant_user,omitempty"`
+}
+
+// AdminTenantUserRoleUpdateForm 租户成员角色更新表单。
+type AdminTenantUserRoleUpdateForm struct {
+	// Role 角色：member/tenant_admin。
+	Role string `json:"role,omitempty"`
+}
+
+// AdminTenantUserListFilter 租户管理员查询成员列表的过滤条件。
+type AdminTenantUserListFilter struct {
+	// Pagination 分页参数（page/limit）。
+	requests.Pagination `json:",inline" query:",inline"`
+	// UserID 按用户ID过滤（可选）。
+	UserID *int64 `json:"user_id,omitempty" query:"user_id"`
+}
diff --git a/backend/app/http/tenant/provider.gen.go b/backend/app/http/tenant/provider.gen.go
index e4dcc2e..26f24ad 100755
--- a/backend/app/http/tenant/provider.gen.go
+++ b/backend/app/http/tenant/provider.gen.go
@@ -60,15 +60,17 @@ func Provide(opts ...opt.Option) error {
 		order *order,
 		orderAdmin *orderAdmin,
 		orderMe *orderMe,
+		tenantUserAdmin *tenantUserAdmin,
 	) (contracts.HttpRoute, error) {
 		obj := &Routes{
-			content:      content,
-			contentAdmin: contentAdmin,
-			me:           me,
-			middlewares:  middlewares,
-			order:        order,
-			orderAdmin:   orderAdmin,
-			orderMe:      orderMe,
+			content:         content,
+			contentAdmin:    contentAdmin,
+			me:              me,
+			middlewares:     middlewares,
+			order:           order,
+			orderAdmin:      orderAdmin,
+			orderMe:         orderMe,
+			tenantUserAdmin: tenantUserAdmin,
 		}
 		if err := obj.Prepare(); err != nil {
 			return nil, err
@@ -78,5 +80,12 @@ func Provide(opts ...opt.Option) error {
 	}, atom.GroupRoutes); err != nil {
 		return err
 	}
+	if err := container.Container.Provide(func() (*tenantUserAdmin, error) {
+		obj := &tenantUserAdmin{}
+
+		return obj, nil
+	}); err != nil {
+		return err
+	}
 	return nil
 }
diff --git a/backend/app/http/tenant/routes.gen.go b/backend/app/http/tenant/routes.gen.go
index a3d6df7..17def4b 100644
--- a/backend/app/http/tenant/routes.gen.go
+++ b/backend/app/http/tenant/routes.gen.go
@@ -24,12 +24,13 @@ type Routes struct {
 	log         *log.Entry `inject:"false"`
 	middlewares *middlewares.Middlewares
 	// Controller instances
-	content      *content
-	contentAdmin *contentAdmin
-	me           *me
-	order        *order
-	orderAdmin   *orderAdmin
-	orderMe      *orderMe
+	content         *content
+	contentAdmin    *contentAdmin
+	me              *me
+	order           *order
+	orderAdmin      *orderAdmin
+	orderMe         *orderMe
+	tenantUserAdmin *tenantUserAdmin
 }
 
 // Prepare initializes the routes provider with logging configuration.
@@ -184,6 +185,29 @@ func (r *Routes) Register(router fiber.Router) {
 		Local[*models.User]("user"),
 		PathParam[int64]("orderID"),
 	))
+	// Register routes for controller: tenantUserAdmin
+	r.log.Debugf("Registering route: Get /t/:tenantCode/v1/admin/users -> tenantUserAdmin.adminTenantUsers")
+	router.Get("/t/:tenantCode/v1/admin/users"[len(r.Path()):], DataFunc3(
+		r.tenantUserAdmin.adminTenantUsers,
+		Local[*models.Tenant]("tenant"),
+		Local[*models.TenantUser]("tenant_user"),
+		Query[dto.AdminTenantUserListFilter]("filter"),
+	))
+	r.log.Debugf("Registering route: Patch /t/:tenantCode/v1/admin/users/:userID/role -> tenantUserAdmin.adminSetUserRole")
+	router.Patch("/t/:tenantCode/v1/admin/users/:userID/role"[len(r.Path()):], DataFunc4(
+		r.tenantUserAdmin.adminSetUserRole,
+		Local[*models.Tenant]("tenant"),
+		Local[*models.TenantUser]("tenant_user"),
+		PathParam[int64]("userID"),
+		Body[dto.AdminTenantUserRoleUpdateForm]("form"),
+	))
+	r.log.Debugf("Registering route: Post /t/:tenantCode/v1/admin/users/:userID/join -> tenantUserAdmin.adminJoinUser")
+	router.Post("/t/:tenantCode/v1/admin/users/:userID/join"[len(r.Path()):], DataFunc3(
+		r.tenantUserAdmin.adminJoinUser,
+		Local[*models.Tenant]("tenant"),
+		Local[*models.TenantUser]("tenant_user"),
+		PathParam[int64]("userID"),
+	))
 
 	r.log.Info("Successfully registered all routes")
 }
diff --git a/backend/app/http/tenant/tenant_user_admin.go b/backend/app/http/tenant/tenant_user_admin.go
new file mode 100644
index 0000000..c2d0edf
--- /dev/null
+++ b/backend/app/http/tenant/tenant_user_admin.go
@@ -0,0 +1,183 @@
+package tenant
+
+import (
+	"strings"
+
+	"quyun/v2/app/errorx"
+	"quyun/v2/app/http/tenant/dto"
+	"quyun/v2/app/requests"
+	"quyun/v2/app/services"
+	"quyun/v2/database/models"
+	"quyun/v2/pkg/consts"
+
+	"github.com/gofiber/fiber/v3"
+	log "github.com/sirupsen/logrus"
+	"go.ipao.vip/gen"
+)
+
+// tenantUserAdmin provides tenant-admin member management endpoints.
+//
+//	@provider
+type tenantUserAdmin struct{}
+
+// adminJoinUser
+//
+//	@Summary	添加租户成员（租户管理）
+//	@Tags		Tenant
+//	@Accept		json
+//	@Produce	json
+//	@Param		tenantCode	path		string	true	"Tenant Code"
+//	@Param		userID		path		int64	true	"UserID"
+//	@Success	200			{object}	dto.AdminTenantUserJoinResponse
+//
+//	@Router		/t/:tenantCode/v1/admin/users/:userID/join [post]
+//	@Bind		tenant local key(tenant)
+//	@Bind		tenantUser local key(tenant_user)
+//	@Bind		userID path
+func (*tenantUserAdmin) adminJoinUser(
+	ctx fiber.Ctx,
+	tenant *models.Tenant,
+	tenantUser *models.TenantUser,
+	userID int64,
+) (*dto.AdminTenantUserJoinResponse, error) {
+	if err := requireTenantAdmin(tenantUser); err != nil {
+		return nil, err
+	}
+	if userID <= 0 {
+		return nil, errorx.ErrInvalidParameter.WithMsg("user_id must be > 0")
+	}
+
+	log.WithFields(log.Fields{
+		"tenant_id":         tenant.ID,
+		"operator_user_id":  tenantUser.UserID,
+		"target_user_id":    userID,
+		"operator_is_admin": true,
+	}).Info("tenant.admin.users.join")
+
+	// 关键逻辑：以 TenantUser 为准创建成员关系；服务层保证幂等（已存在则不重复创建）。
+	if err := services.Tenant.AddUser(ctx.Context(), tenant.ID, userID); err != nil {
+		return nil, err
+	}
+
+	m, err := services.Tenant.FindTenantUser(ctx.Context(), tenant.ID, userID)
+	if err != nil {
+		return nil, err
+	}
+	return &dto.AdminTenantUserJoinResponse{TenantUser: m}, nil
+}
+
+// adminSetUserRole
+//
+//	@Summary	设置成员角色（租户管理）
+//	@Tags		Tenant
+//	@Accept		json
+//	@Produce	json
+//	@Param		tenantCode	path		string							true	"Tenant Code"
+//	@Param		userID		path		int64							true	"UserID"
+//	@Param		form		body		dto.AdminTenantUserRoleUpdateForm	true	"Form"
+//	@Success	200			{object}	dto.AdminTenantUserJoinResponse
+//
+//	@Router		/t/:tenantCode/v1/admin/users/:userID/role [patch]
+//	@Bind		tenant local key(tenant)
+//	@Bind		tenantUser local key(tenant_user)
+//	@Bind		userID path
+//	@Bind		form body
+func (*tenantUserAdmin) adminSetUserRole(
+	ctx fiber.Ctx,
+	tenant *models.Tenant,
+	tenantUser *models.TenantUser,
+	userID int64,
+	form *dto.AdminTenantUserRoleUpdateForm,
+) (*dto.AdminTenantUserJoinResponse, error) {
+	if err := requireTenantAdmin(tenantUser); err != nil {
+		return nil, err
+	}
+	if userID <= 0 || form == nil {
+		return nil, errorx.ErrInvalidParameter
+	}
+
+	roleStr := strings.TrimSpace(form.Role)
+	if roleStr == "" {
+		return nil, errorx.ErrInvalidParameter.WithMsg("role is required")
+	}
+
+	var role consts.TenantUserRole
+	switch roleStr {
+	case string(consts.TenantUserRoleMember):
+		role = consts.TenantUserRoleMember
+	case string(consts.TenantUserRoleTenantAdmin):
+		role = consts.TenantUserRoleTenantAdmin
+	default:
+		return nil, errorx.ErrInvalidParameter.WithMsg("invalid role")
+	}
+
+	log.WithFields(log.Fields{
+		"tenant_id":        tenant.ID,
+		"operator_user_id": tenantUser.UserID,
+		"target_user_id":   userID,
+		"role":             role,
+	}).Info("tenant.admin.users.set_role")
+
+	if err := services.Tenant.SetUserRole(ctx.Context(), tenant.ID, userID, role); err != nil {
+		return nil, err
+	}
+
+	m, err := services.Tenant.FindTenantUser(ctx.Context(), tenant.ID, userID)
+	if err != nil {
+		return nil, err
+	}
+	return &dto.AdminTenantUserJoinResponse{TenantUser: m}, nil
+}
+
+// adminTenantUsers
+//
+//	@Summary	成员列表（租户管理）
+//	@Tags		Tenant
+//	@Accept		json
+//	@Produce	json
+//	@Param		tenantCode	path		string						true	"Tenant Code"
+//	@Param		filter		query		dto.AdminTenantUserListFilter	true	"Filter"
+//	@Success	200			{object}	requests.Pager{items=models.TenantUser}
+//
+//	@Router		/t/:tenantCode/v1/admin/users [get]
+//	@Bind		tenant local key(tenant)
+//	@Bind		tenantUser local key(tenant_user)
+//	@Bind		filter query
+func (*tenantUserAdmin) adminTenantUsers(
+	ctx fiber.Ctx,
+	tenant *models.Tenant,
+	tenantUser *models.TenantUser,
+	filter *dto.AdminTenantUserListFilter,
+) (*requests.Pager, error) {
+	if err := requireTenantAdmin(tenantUser); err != nil {
+		return nil, err
+	}
+	if filter == nil {
+		filter = &dto.AdminTenantUserListFilter{}
+	}
+
+	log.WithFields(log.Fields{
+		"tenant_id": tenant.ID,
+		"user_id":   tenantUser.UserID,
+		"query_uid": filter.UserID,
+	}).Info("tenant.admin.users.list")
+
+	filter.Pagination.Format()
+
+	tbl, query := models.TenantUserQuery.QueryContext(ctx.Context())
+	conds := []gen.Condition{tbl.TenantID.Eq(tenant.ID)}
+	if filter.UserID != nil && *filter.UserID > 0 {
+		conds = append(conds, tbl.UserID.Eq(*filter.UserID))
+	}
+
+	items, total, err := query.Where(conds...).Order(tbl.ID.Desc()).FindByPage(int(filter.Offset()), int(filter.Limit))
+	if err != nil {
+		return nil, err
+	}
+
+	return &requests.Pager{
+		Pagination: filter.Pagination,
+		Total:      total,
+		Items:      items,
+	}, nil
+}
diff --git a/backend/app/services/tenant.go b/backend/app/services/tenant.go
index 2bfc038..b228a21 100644
--- a/backend/app/services/tenant.go
+++ b/backend/app/services/tenant.go
@@ -15,6 +15,8 @@ import (
 	"github.com/samber/lo"
 	"github.com/sirupsen/logrus"
 	"go.ipao.vip/gen"
+	"go.ipao.vip/gen/types"
+	"gorm.io/gorm"
 )
 
 // tenant implements tenant-related domain operations.
@@ -35,9 +37,27 @@ func (t *tenant) ContainsUserID(ctx context.Context, tenantID, userID int64) (*m
 
 // AddUser
 func (t *tenant) AddUser(ctx context.Context, tenantID, userID int64) error {
+	logrus.WithFields(logrus.Fields{
+		"tenant_id": tenantID,
+		"user_id":   userID,
+	}).Info("services.tenant.add_user")
+
+	// 幂等：若成员关系已存在，则直接返回成功，避免重复插入触发唯一约束错误。
+	tbl, query := models.TenantUserQuery.QueryContext(ctx)
+	_, err := query.Where(tbl.TenantID.Eq(tenantID), tbl.UserID.Eq(userID)).First()
+	if err == nil {
+		return nil
+	}
+	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
+		return errors.Wrapf(err, "AddUser failed to query existing, tenantID: %d, userID: %d", tenantID, userID)
+	}
+
+	// 关键默认值：加入租户默认成为 member，并设置为 verified（避免 DB 默认值与枚举不一致导致脏数据）。
 	tenantUser := &models.TenantUser{
 		TenantID: tenantID,
 		UserID:   userID,
+		Role:     types.NewArray([]consts.TenantUserRole{consts.TenantUserRoleMember}),
+		Status:   consts.UserStatusVerified,
 	}
 
 	if err := tenantUser.Create(ctx); err != nil {
@@ -69,7 +89,8 @@ func (t *tenant) SetUserRole(ctx context.Context, tenantID, userID int64, role .
 		return errors.Wrapf(err, "SetUserRole failed to find, tenantID: %d, userID: %d", tenantID, userID)
 	}
 
-	tenantUser.Role = role
+	// 角色更新：当前约定 role 数组通常只存一个主角色（member/tenant_admin）。
+	tenantUser.Role = types.NewArray(role)
 	if _, err := tenantUser.Update(ctx); err != nil {
 		return errors.Wrapf(err, "SetUserRole failed to update, tenantID: %d, userID: %d", tenantID, userID)
 	}
diff --git a/backend/app/services/tenant_test.go b/backend/app/services/tenant_test.go
index 0e0d548..e1ce13e 100644
--- a/backend/app/services/tenant_test.go
+++ b/backend/app/services/tenant_test.go
@@ -7,6 +7,7 @@ import (
 	"quyun/v2/app/commands/testx"
 	"quyun/v2/database"
 	"quyun/v2/database/models"
+	"quyun/v2/pkg/consts"
 	"quyun/v2/pkg/utils"
 
 	. "github.com/smartystreets/goconvey/convey"
@@ -48,3 +49,52 @@ func (t *TenantTestSuite) Test_TenantUserCount() {
 		t.T().Logf("%s", utils.MustJsonString(result))
 	})
 }
+
+func (t *TenantTestSuite) Test_AddUser() {
+	Convey("Tenant.AddUser", t.T(), func() {
+		ctx := t.T().Context()
+		tenantID := int64(1)
+		userID := int64(2)
+
+		database.Truncate(ctx, t.DB, models.TableNameTenantUser)
+
+		Convey("首次添加成员成功", func() {
+			err := Tenant.AddUser(ctx, tenantID, userID)
+			So(err, ShouldBeNil)
+
+			m, err := Tenant.FindTenantUser(ctx, tenantID, userID)
+			So(err, ShouldBeNil)
+			So(m, ShouldNotBeNil)
+			So(m.TenantID, ShouldEqual, tenantID)
+			So(m.UserID, ShouldEqual, userID)
+		})
+
+		Convey("重复添加应幂等返回成功", func() {
+			So(Tenant.AddUser(ctx, tenantID, userID), ShouldBeNil)
+			So(Tenant.AddUser(ctx, tenantID, userID), ShouldBeNil)
+		})
+	})
+}
+
+func (t *TenantTestSuite) Test_SetUserRole() {
+	Convey("Tenant.SetUserRole", t.T(), func() {
+		ctx := t.T().Context()
+		tenantID := int64(1)
+		userID := int64(2)
+
+		database.Truncate(ctx, t.DB, models.TableNameTenantUser)
+
+		So(Tenant.AddUser(ctx, tenantID, userID), ShouldBeNil)
+
+		Convey("设置为 tenant_admin 成功", func() {
+			err := Tenant.SetUserRole(ctx, tenantID, userID, consts.TenantUserRoleTenantAdmin)
+			So(err, ShouldBeNil)
+
+			m, err := Tenant.FindTenantUser(ctx, tenantID, userID)
+			So(err, ShouldBeNil)
+			So(m, ShouldNotBeNil)
+			So(len(m.Role), ShouldEqual, 1)
+			So(m.Role[0], ShouldEqual, consts.TenantUserRoleTenantAdmin)
+		})
+	})
+}
diff --git a/backend/database/migrations/20251218171000_fix_tenant_users_status_default.sql b/backend/database/migrations/20251218171000_fix_tenant_users_status_default.sql
new file mode 100644
index 0000000..5795fe0
--- /dev/null
+++ b/backend/database/migrations/20251218171000_fix_tenant_users_status_default.sql
@@ -0,0 +1,19 @@
+-- +goose Up
+-- +goose StatementBegin
+-- tenant_users.status：历史上默认值为 'active'，但代码枚举使用 UserStatus（pending_verify/verified/banned）。
+-- 为避免新增成员落入未知状态，这里将默认值调整为 'verified'，并修正存量 'active' -> 'verified'。
+ALTER TABLE tenant_users
+    ALTER COLUMN status SET DEFAULT 'verified';
+
+UPDATE tenant_users
+SET status = 'verified'
+WHERE status = 'active';
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+-- 回滚：恢复默认值为 'active'（不回滚数据修正）。
+ALTER TABLE tenant_users
+    ALTER COLUMN status SET DEFAULT 'active';
+-- +goose StatementEnd
+
diff --git a/backend/docs/docs.go b/backend/docs/docs.go
index 0e1a65a..3d5a3e5 100644
--- a/backend/docs/docs.go
+++ b/backend/docs/docs.go
@@ -803,6 +803,154 @@ const docTemplate = `{
                 }
             }
         },
+        "/t/{tenantCode}/v1/admin/users": {
+            "get": {
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Tenant"
+                ],
+                "summary": "成员列表（租户管理）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "Tenant Code",
+                        "name": "tenantCode",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "integer",
+                        "description": "Limit is page size; only values in {10,20,50,100} are accepted (otherwise defaults to 10).",
+                        "name": "limit",
+                        "in": "query"
+                    },
+                    {
+                        "type": "integer",
+                        "description": "Page is 1-based page index; values \u003c= 0 are normalized to 1.",
+                        "name": "page",
+                        "in": "query"
+                    },
+                    {
+                        "type": "integer",
+                        "description": "UserID 按用户ID过滤（可选）。",
+                        "name": "user_id",
+                        "in": "query"
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/requests.Pager"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "items": {
+                                            "$ref": "#/definitions/models.TenantUser"
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "/t/{tenantCode}/v1/admin/users/{userID}/join": {
+            "post": {
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Tenant"
+                ],
+                "summary": "添加租户成员（租户管理）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "Tenant Code",
+                        "name": "tenantCode",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "integer",
+                        "format": "int64",
+                        "description": "UserID",
+                        "name": "userID",
+                        "in": "path",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/dto.AdminTenantUserJoinResponse"
+                        }
+                    }
+                }
+            }
+        },
+        "/t/{tenantCode}/v1/admin/users/{userID}/role": {
+            "patch": {
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Tenant"
+                ],
+                "summary": "设置成员角色（租户管理）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "Tenant Code",
+                        "name": "tenantCode",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "integer",
+                        "format": "int64",
+                        "description": "UserID",
+                        "name": "userID",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "description": "Form",
+                        "name": "form",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/dto.AdminTenantUserRoleUpdateForm"
+                        }
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/dto.AdminTenantUserJoinResponse"
+                        }
+                    }
+                }
+            }
+        },
         "/t/{tenantCode}/v1/admin/users/{userID}/topup": {
             "post": {
                 "consumes": [
@@ -1553,6 +1701,28 @@ const docTemplate = `{
                 }
             }
         },
+        "dto.AdminTenantUserJoinResponse": {
+            "type": "object",
+            "properties": {
+                "tenant_user": {
+                    "description": "TenantUser 租户成员关系记录。",
+                    "allOf": [
+                        {
+                            "$ref": "#/definitions/models.TenantUser"
+                        }
+                    ]
+                }
+            }
+        },
+        "dto.AdminTenantUserRoleUpdateForm": {
+            "type": "object",
+            "properties": {
+                "role": {
+                    "description": "Role 角色：member/tenant_admin。",
+                    "type": "string"
+                }
+            }
+        },
         "dto.AdminTopupForm": {
             "type": "object",
             "properties": {
diff --git a/backend/docs/swagger.json b/backend/docs/swagger.json
index d816b6d..6100227 100644
--- a/backend/docs/swagger.json
+++ b/backend/docs/swagger.json
@@ -797,6 +797,154 @@
                 }
             }
         },
+        "/t/{tenantCode}/v1/admin/users": {
+            "get": {
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Tenant"
+                ],
+                "summary": "成员列表（租户管理）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "Tenant Code",
+                        "name": "tenantCode",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "integer",
+                        "description": "Limit is page size; only values in {10,20,50,100} are accepted (otherwise defaults to 10).",
+                        "name": "limit",
+                        "in": "query"
+                    },
+                    {
+                        "type": "integer",
+                        "description": "Page is 1-based page index; values \u003c= 0 are normalized to 1.",
+                        "name": "page",
+                        "in": "query"
+                    },
+                    {
+                        "type": "integer",
+                        "description": "UserID 按用户ID过滤（可选）。",
+                        "name": "user_id",
+                        "in": "query"
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/requests.Pager"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "items": {
+                                            "$ref": "#/definitions/models.TenantUser"
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    }
+                }
+            }
+        },
+        "/t/{tenantCode}/v1/admin/users/{userID}/join": {
+            "post": {
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Tenant"
+                ],
+                "summary": "添加租户成员（租户管理）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "Tenant Code",
+                        "name": "tenantCode",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "integer",
+                        "format": "int64",
+                        "description": "UserID",
+                        "name": "userID",
+                        "in": "path",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/dto.AdminTenantUserJoinResponse"
+                        }
+                    }
+                }
+            }
+        },
+        "/t/{tenantCode}/v1/admin/users/{userID}/role": {
+            "patch": {
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Tenant"
+                ],
+                "summary": "设置成员角色（租户管理）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "Tenant Code",
+                        "name": "tenantCode",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "type": "integer",
+                        "format": "int64",
+                        "description": "UserID",
+                        "name": "userID",
+                        "in": "path",
+                        "required": true
+                    },
+                    {
+                        "description": "Form",
+                        "name": "form",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/dto.AdminTenantUserRoleUpdateForm"
+                        }
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/dto.AdminTenantUserJoinResponse"
+                        }
+                    }
+                }
+            }
+        },
         "/t/{tenantCode}/v1/admin/users/{userID}/topup": {
             "post": {
                 "consumes": [
@@ -1547,6 +1695,28 @@
                 }
             }
         },
+        "dto.AdminTenantUserJoinResponse": {
+            "type": "object",
+            "properties": {
+                "tenant_user": {
+                    "description": "TenantUser 租户成员关系记录。",
+                    "allOf": [
+                        {
+                            "$ref": "#/definitions/models.TenantUser"
+                        }
+                    ]
+                }
+            }
+        },
+        "dto.AdminTenantUserRoleUpdateForm": {
+            "type": "object",
+            "properties": {
+                "role": {
+                    "description": "Role 角色：member/tenant_admin。",
+                    "type": "string"
+                }
+            }
+        },
         "dto.AdminTopupForm": {
             "type": "object",
             "properties": {
diff --git a/backend/docs/swagger.yaml b/backend/docs/swagger.yaml
index 6871cee..f7e4276 100644
--- a/backend/docs/swagger.yaml
+++ b/backend/docs/swagger.yaml
@@ -185,6 +185,19 @@ definitions:
           退款原因：建议必填（由业务侧校验）；用于审计与追责。
         type: string
     type: object
+  dto.AdminTenantUserJoinResponse:
+    properties:
+      tenant_user:
+        allOf:
+        - $ref: '#/definitions/models.TenantUser'
+        description: TenantUser 租户成员关系记录。
+    type: object
+  dto.AdminTenantUserRoleUpdateForm:
+    properties:
+      role:
+        description: Role 角色：member/tenant_admin。
+        type: string
+    type: object
   dto.AdminTopupForm:
     properties:
       amount:
@@ -1511,6 +1524,102 @@ paths:
       summary: 订单退款（租户管理）
       tags:
       - Tenant
+  /t/{tenantCode}/v1/admin/users:
+    get:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: Limit is page size; only values in {10,20,50,100} are accepted
+          (otherwise defaults to 10).
+        in: query
+        name: limit
+        type: integer
+      - description: Page is 1-based page index; values <= 0 are normalized to 1.
+        in: query
+        name: page
+        type: integer
+      - description: UserID 按用户ID过滤（可选）。
+        in: query
+        name: user_id
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            allOf:
+            - $ref: '#/definitions/requests.Pager'
+            - properties:
+                items:
+                  $ref: '#/definitions/models.TenantUser'
+              type: object
+      summary: 成员列表（租户管理）
+      tags:
+      - Tenant
+  /t/{tenantCode}/v1/admin/users/{userID}/join:
+    post:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: UserID
+        format: int64
+        in: path
+        name: userID
+        required: true
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.AdminTenantUserJoinResponse'
+      summary: 添加租户成员（租户管理）
+      tags:
+      - Tenant
+  /t/{tenantCode}/v1/admin/users/{userID}/role:
+    patch:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: UserID
+        format: int64
+        in: path
+        name: userID
+        required: true
+        type: integer
+      - description: Form
+        in: body
+        name: form
+        required: true
+        schema:
+          $ref: '#/definitions/dto.AdminTenantUserRoleUpdateForm'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.AdminTenantUserJoinResponse'
+      summary: 设置成员角色（租户管理）
+      tags:
+      - Tenant
   /t/{tenantCode}/v1/admin/users/{userID}/topup:
     post:
       consumes:
diff --git a/backend/tests/tenant.http b/backend/tests/tenant.http
index 05ab1df..b8a6b11 100644
--- a/backend/tests/tenant.http
+++ b/backend/tests/tenant.http
@@ -151,3 +151,23 @@ Authorization: Bearer {{ token }}
   "reason": "联调充值",
   "idempotency_key": "topup-{{ topupUserID }}-001"
 }
+
+### Tenant Admin - Join a user to tenant (add member)
+@joinUserID = 3
+POST {{ host }}/t/{{ tenantCode }}/v1/admin/users/{{ joinUserID }}/join
+Content-Type: application/json
+Authorization: Bearer {{ token }}
+
+### Tenant Admin - Set member role
+PATCH {{ host }}/t/{{ tenantCode }}/v1/admin/users/{{ joinUserID }}/role
+Content-Type: application/json
+Authorization: Bearer {{ token }}
+
+{
+  "role": "tenant_admin"
+}
+
+### Tenant Admin - Tenant members list
+GET {{ host }}/t/{{ tenantCode }}/v1/admin/users?page=1&limit=20
+Content-Type: application/json
+Authorization: Bearer {{ token }}