diff --git a/dsAiTeachingModel/api/controller/UserController.py b/dsAiTeachingModel/api/controller/UserController.py
index bff5dd85..2b1d1a3f 100644
--- a/dsAiTeachingModel/api/controller/UserController.py
+++ b/dsAiTeachingModel/api/controller/UserController.py
@@ -21,7 +21,7 @@ async def modify_telephone(request: Request):
     # 校验手机号码是否已被注册
     select_telephone_sql: str = "select * from t_sys_loginperson where b_use = 1 and telephone = '" + telephone + "' and person_id <> '" + person_id + "'"
     userlist = await find_by_sql(select_telephone_sql, ())
-    if len(userlist) > 0:
+    if userlist is not None:
         return {"success": False, "message": "手机号码已被注册"}
     else:
         update_telephone_sql: str = "update t_sys_loginperson set telephone = '" + telephone + "' where person_id = '" + person_id + "'"