diff --git a/server/payserver/api/v1/mainservice/mainservice.go b/server/payserver/api/v1/mainservice/mainservice.go
index 5ca92de..6c65f27 100644
--- a/server/payserver/api/v1/mainservice/mainservice.go
+++ b/server/payserver/api/v1/mainservice/mainservice.go
@@ -101,8 +101,7 @@ func (this *MainServiceApi) WxNotifyPurchase(c *gin.Context) {
 
 		smsg, appid := service.Wxpay.DecryptMsg(msg_signature, timestamp, nonce, postObj.Encrypt)
 		if len(smsg) == 0 || len(appid) == 0 {
-			rspObj.ErrorCode = 402
-			rspObj.ErrMsg = "decrypt data error"
+			f5.GetSysLog().Debug("decrypt data error")
 			c.JSON(200, rspObj)
 			return
 		}
@@ -111,8 +110,7 @@ func (this *MainServiceApi) WxNotifyPurchase(c *gin.Context) {
 
 		wxnotifyobj := service.WxPurchaseNotify{}
 		if json.Unmarshal(smsg, &wxnotifyobj) != nil {
-			rspObj.ErrorCode = 403
-			rspObj.ErrMsg = "unmarshal data error"
+			f5.GetSysLog().Debug("unmarshal data error")
 			c.JSON(200, rspObj)
 			return
 		}
diff --git a/server/payserver/service/wxpaybase.go b/server/payserver/service/wxpaybase.go
index 738f0af..c5d39c7 100644
--- a/server/payserver/service/wxpaybase.go
+++ b/server/payserver/service/wxpaybase.go
@@ -60,9 +60,9 @@ func (wp *wxpay) DecryptMsg(sMsgSignature string, sTimeStamp string, sNonce stri
 	}
 	netlenbyte := sNoEncryptData[constant.WX_RANDENCRYPT_STRLEN : constant.WX_RANDENCRYPT_STRLEN+constant.WX_KMSG_LEN]
 	buf := bytes.NewReader(netlenbyte)
-	iMsgLen := int(0) //ntohl(iNetLen);
-	binary.Read(buf, binary.LittleEndian, &iMsgLen)
-	if len(sNoEncryptData) <= constant.WX_RANDENCRYPT_STRLEN+constant.WX_KMSG_LEN+iMsgLen {
+	iMsgLen := int32(0) //ntohl(iNetLen);
+	binary.Read(buf, binary.BigEndian, &iMsgLen)
+	if len(sNoEncryptData) <= constant.WX_RANDENCRYPT_STRLEN+constant.WX_KMSG_LEN+int(iMsgLen) {
 		return
 	}
 	sMsg = sNoEncryptData[constant.WX_RANDENCRYPT_STRLEN+constant.WX_KMSG_LEN : constant.WX_RANDENCRYPT_STRLEN+constant.WX_KMSG_LEN+iMsgLen]