diff --git a/app/api/routers/rbac_admin.py b/app/api/routers/rbac_admin.py
index 9295da4..5454264 100644
--- a/app/api/routers/rbac_admin.py
+++ b/app/api/routers/rbac_admin.py
@@ -242,15 +242,20 @@ async def delete_user(
 
     # 获取数据库中所有表的列信息，避免对没有 user_id 的表执行删除
     from sqlalchemy import inspect as sa_inspect
-    insp = sa_inspect(db.session.bind)
-    tables_with_user_id = set()
-    for tname in cascade_tables:
-        try:
-            cols = [c["name"] for c in insp.get_columns(tname)]
-            if "user_id" in cols:
-                tables_with_user_id.add(tname)
-        except Exception:
-            pass
+
+    def _get_tables_with_user_id(sync_conn):
+        insp = sa_inspect(sync_conn)
+        result = set()
+        for tname in cascade_tables:
+            try:
+                cols = [c["name"] for c in insp.get_columns(tname)]
+                if "user_id" in cols:
+                    result.add(tname)
+            except Exception:
+                pass
+        return result
+
+    tables_with_user_id = await db.session.run_sync(_get_tables_with_user_id)
 
     deleted_count = 0
     for table in tables_with_user_id: