diff --git a/business/partner/purchase/mtwm/callback.go b/business/partner/purchase/mtwm/callback.go
index 097ee9a4a..623313a78 100644
--- a/business/partner/purchase/mtwm/callback.go
+++ b/business/partner/purchase/mtwm/callback.go
@@ -38,7 +38,7 @@ func OnCallbackMsg(msg *mtwmapi.CallbackMsg, msgType string) (response *mtwmapi.
 			skuInfo := msg.FormData.Get("retail_data")
 			globals.SugarLogger.Debugf("-----FormData := %s", utils.Format4Output(skuInfo, false))
 			dataMap := make([]*mtwmapi.VendorUpdateSkuCallback, 0, 0)
-			if err := json.Unmarshal([]byte(skuInfo), &dataMap); err != nil {
+			if err := utils.UnmarshalUseNumber([]byte(skuInfo), &dataMap); err != nil {
 				globals.SugarLogger.Debugf("-----err := %v", err)
 				return nil
 			}