diff --git a/webapp/services/callback/common/SignatureService.php b/webapp/services/callback/common/SignatureService.php
index e4f4e0bc..607f71e5 100644
--- a/webapp/services/callback/common/SignatureService.php
+++ b/webapp/services/callback/common/SignatureService.php
@@ -17,11 +17,13 @@ class SignatureService {
             )
         );
         if (!$row) {
+            error_log('error sign1:' . json_encode($_REQUEST));
             myself()-_rspErr(self::ERRCODE_SIGN_ERROR, 'not found cb info');
             die();
         }
         $sign = self::normalMd5Sign($_REQUEST, $row['secret_key'], array('_sign'));
         if ($sign != $row['signature']) {
+            error_log('error sign2:' . json_encode($_REQUEST));
             myself()-_rspErr(self::ERRCODE_SIGN_ERROR, 'sign error');
             die();
         }