diff --git a/business/partner/purchase/mtwm/callback.go b/business/partner/purchase/mtwm/callback.go
index 7e2891797..e7fe010d5 100644
--- a/business/partner/purchase/mtwm/callback.go
+++ b/business/partner/purchase/mtwm/callback.go
@@ -35,7 +35,7 @@ func OnCallbackMsg(msg *mtwmapi.CallbackMsg, msgType string) (response *mtwmapi.
 			response = mtwmapi.Err2CallbackResponse(err, "")
 		} else if msg.Cmd == mtwmapi.MsgTypeSkuUpdate {
 			globals.SugarLogger.Debugf("-----MsgTypeSkuUpdate := %s", utils.Format4Output(msg.FormData.Get("retail_data"), false))
-			dataMap := make(map[string]interface{}, 0)
+			dataMap := make([]*mtwmapi.VendorUpdateSkuCallback, 0, 0)
 			json.Unmarshal([]byte(msg.FormData.Get("retail_data")), &dataMap)
 			globals.SugarLogger.Debugf("-----MsgTypeSkuUpdate := %s", utils.Format4Output(dataMap, false))
 			return mtwmapi.Err2CallbackResponse(nil, "")