diff --git a/sql/engines/mongo.py b/sql/engines/mongo.py
index 47ac92499f..4b76db7cc9 100644
--- a/sql/engines/mongo.py
+++ b/sql/engines/mongo.py
@@ -354,7 +354,7 @@ def exec_cmd(self, sql, db_name=None, slave_ok=""):
 
                 msg = "\n".join(_re_msg)
                 # 替换掉当语句长度超过4000使用load命令执行js 后多余返回的true
-                msg = msg.replace('true\n','')
+                msg = msg.replace('true\n',"")
             except Exception as e:
                 logger.warning(f"mongo语句执行报错，语句：{sql}，{e}错误信息{traceback.format_exc()}")
             finally: