diff --git a/platformapi/wxpay/wxpay.go b/platformapi/wxpay/wxpay.go
index afee6dd1..8529de4b 100644
--- a/platformapi/wxpay/wxpay.go
+++ b/platformapi/wxpay/wxpay.go
@@ -283,10 +283,12 @@ func (a *API) AccessAPI(action string, requestParam IRequestBase) (retVal map[st
 	requestParam.SetMchID(a.mchID)
 	requestParam.SetNonceStr(utils.GetUUID())
 	requestParam.SetSignType(sigType)
-	requestParam.SetSign(a.signParam(utils.Struct2FlatMap(requestParam)))
+	signStr := a.signParam(utils.Struct2FlatMap(requestParam))
+	requestParam.SetSign(signStr)
 
 	fullURL := utils.GenerateGetURL(prodURL, action, nil)
 
+	var responseStr string
 	err = platformapi.AccessPlatformAPIWithRetry(a.client,
 		func() *http.Request {
 			request, _ := http.NewRequest(http.MethodPost, fullURL, bytes.NewReader(mustMarshalXML(requestParam)))
@@ -294,6 +296,7 @@ func (a *API) AccessAPI(action string, requestParam IRequestBase) (retVal map[st
 		},
 		a.config,
 		func(response *http.Response, bodyStr string, jsonResult1 map[string]interface{}) (errLevel string, err error) {
+			responseStr = bodyStr
 			if jsonResult1 == nil {
 				return platformapi.ErrLevelRecoverableErr, fmt.Errorf("mapData is nil")
 			}
@@ -303,6 +306,9 @@ func (a *API) AccessAPI(action string, requestParam IRequestBase) (retVal map[st
 	if err == nil {
 		if utils.Interface2String(retVal["result_code"]) != ResponseCodeSuccess {
 			err = utils.NewErrorCode(utils.Interface2String(retVal["err_code_des"]), utils.Interface2String(retVal["err_code"]))
+			if err != nil {
+				baseapi.SugarLogger.Debugf("wxpay AccessAPI %s failed:%s, err:%v", signStr, strings.ReplaceAll(responseStr, "\\n", " "), err)
+			}
 			retVal = nil
 		}
 	}