diff --git a/platformapi/mtwmapi/callback.go b/platformapi/mtwmapi/callback.go
index d3c6a083..4f9e8577 100644
--- a/platformapi/mtwmapi/callback.go
+++ b/platformapi/mtwmapi/callback.go
@@ -80,7 +80,7 @@ func (a *API) GetCallbackMsg(request *http.Request) (msg *CallbackMsg, callbackR
 				}
 			}
 		} else {
-			callbackResponse = SignatureIsNotOk
+			callbackResponse = SuccessResponse // 美团外卖PING消息没有sign
 		}
 	} else {
 		baseapi.SugarLogger.Warnf("mtwm GetCallbackMsg ParseForm failed with error:%v", err)