diff --git a/backend/internal/app/admin_user_disable_session_test.go b/backend/internal/app/admin_user_disable_session_test.go
new file mode 100644
index 000000000..fe60363f0
--- /dev/null
+++ b/backend/internal/app/admin_user_disable_session_test.go
@@ -0,0 +1,72 @@
+package app
+
+import (
+	"testing"
+	"time"
+
+	"infinite-canvas/backend/internal/model"
+	"infinite-canvas/backend/internal/repository"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+func TestUpdateUserDisableRevokesSessions(t *testing.T) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	sqlDB, err := db.DB()
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = sqlDB.Close() })
+	if err := db.AutoMigrate(&model.User{}, &model.AuthSession{}, &model.AdminAuditEvent{}); err != nil {
+		t.Fatal(err)
+	}
+	svc := &Service{repo: repository.New(db)}
+	actor := &model.User{ID: "admin", Username: "admin", Role: model.UserRoleAdmin, Status: model.UserStatusActive}
+	user := model.User{ID: "member", Username: "member", Role: model.UserRoleUser, Status: model.UserStatusActive}
+	other := model.User{ID: "other", Username: "other", Role: model.UserRoleUser, Status: model.UserStatusActive}
+	for _, u := range []*model.User{actor, &user, &other} {
+		if err := db.Create(u).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+	for _, session := range []model.AuthSession{
+		{ID: "one", UserID: user.ID, TokenHash: hashToken("token-one"), ExpiresAt: time.Now().Add(time.Hour)},
+		{ID: "two", UserID: user.ID, TokenHash: hashToken("token-two"), ExpiresAt: time.Now().Add(time.Hour)},
+		{ID: "other", UserID: other.ID, TokenHash: hashToken("token-other"), ExpiresAt: time.Now().Add(time.Hour)},
+	} {
+		if err := db.Create(&session).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+	if _, err := svc.UpdateUser(actor, user.ID, UpdateUserRequest{DisplayName: "Creator"}); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := svc.CurrentUser("one.token-one"); err != nil {
+		t.Fatalf("profile edit revoked session: %v", err)
+	}
+	if _, err := svc.UpdateUser(actor, user.ID, UpdateUserRequest{Status: model.UserStatusDisabled}); err != nil {
+		t.Fatal(err)
+	}
+	var count int64
+	if err := db.Model(&model.AuthSession{}).Where("user_id = ?", user.ID).Count(&count).Error; err != nil {
+		t.Fatal(err)
+	}
+	if count != 0 {
+		t.Errorf("disabled user session count = %d, want 0", count)
+	}
+	if _, err := svc.UpdateUser(actor, user.ID, UpdateUserRequest{Status: model.UserStatusActive}); err != nil {
+		t.Fatal(err)
+	}
+	for _, cookie := range []string{"one.token-one", "two.token-two"} {
+		if _, err := svc.CurrentUser(cookie); err == nil {
+			t.Errorf("old cookie revived after re-enable: %s", cookie)
+		}
+	}
+	if _, err := svc.CurrentUser("other.token-other"); err != nil {
+		t.Fatalf("other user's session revoked: %v", err)
+	}
+}
diff --git a/backend/internal/app/admin_users.go b/backend/internal/app/admin_users.go
index a0e1cd8b6..84c951db4 100644
--- a/backend/internal/app/admin_users.go
+++ b/backend/internal/app/admin_users.go
@@ -238,6 +238,11 @@ func (s *Service) UpdateUser(actor *model.User, userID string, req UpdateUserReq
 			return nil, fmt.Errorf("清理旧登录会话失败，密码未更新：%w", err)
 		}
 	}
+	if nextStatus == model.UserStatusDisabled {
+		if err := s.repo.DeleteUserAuthSessions(user.ID); err != nil {
+			return nil, err
+		}
+	}
 	user.Role = nextRole
 	user.Status = nextStatus
 	user.UpdatedAt = time.Now()