diff --git a/webapp/controller/KefuController.class.php b/webapp/controller/KefuController.class.php
index d0310ae..9fa147d 100644
--- a/webapp/controller/KefuController.class.php
+++ b/webapp/controller/KefuController.class.php
@@ -198,21 +198,6 @@ class KefuController {
         }
     }
 
-    private function encryptJson()
-    {
-        $pc = new WXBizMsgCrypt(WEIXIN_TOKEN, WEIXIN_MSG_KEY, WEIXIN_APP_ID);
-        $encryptMsg = '';
-        $text = $postStr;
-        $errcode = $pc->encryptJsonMsg($text, $timeStamp, $nonce, $encryptMsg_str);
-        if ($errcode == 0) {
-            $encryptMsg = json_decode($encryptMsg_str, true);
-
-            $errcode = $pc->decryptJsonMsg($encryptMsg['MsgSignature'], $timeStamp, $nonce,
-                                           $encryptMsg_str, $postStr2);
-        } else {
-        }
-    }
-
     private function sendKefuMsg($accountid, $data)
     {
         $access_token = $this->getAccessToken($accountid);