diff --git a/lib/wechat.js b/lib/wechat.js
index 640e585d..a6c428ee 100644
--- a/lib/wechat.js
+++ b/lib/wechat.js
@@ -238,15 +238,14 @@ var respond = function (handler) {
   return function (req, res, next) {
     var message = req.weixin;
     var callback = handler.getHandler(message.MsgType);
-    res.reply = function (content) {
-      res.writeHead(200);
-      // 响应空字符串，用于响应慢的情况，避免微信重试
-      if (!content) {
-        return res.end('');
-      }
-      var xml = reply(content, message.ToUserName, message.FromUserName, message);
+
+    /**
+     * 根据条件对返回的XML数据加密
+     * @param xml
+     */
+    function encryptXml(xml) {
       if (!req.query.encrypt_type || req.query.encrypt_type === 'raw') {
-        res.end(xml);
+        return xml;
       } else {
         // 判断是否已有前置cryptor
         var cryptor = req.cryptor || handler.cryptor;
@@ -255,14 +254,25 @@ var respond = function (handler) {
         wrap.nonce = parseInt((Math.random() * 100000000000), 10);
         wrap.timestamp = new Date().getTime();
         wrap.signature = cryptor.getSignature(wrap.timestamp, wrap.nonce, wrap.encrypt);
-        res.end(encryptWrap(wrap));
+        return encryptWrap(wrap);
       }
+    }
+
+    res.reply = function (content) {
+      res.writeHead(200);
+      // 响应空字符串，用于响应慢的情况，避免微信重试
+      if (!content) {
+        return res.end('');
+      }
+
+      res.end(encryptXml(reply(content, message.ToUserName, message.FromUserName, message)));
     };
 
     // 响应消息，转到客服模式
     res.transfer2CustomerService = function (kfAccount) {
       res.writeHead(200);
-      res.end(reply2CustomerService(message.ToUserName, message.FromUserName, kfAccount));
+
+      res.end(encryptXml(reply2CustomerService(message.ToUserName, message.FromUserName, kfAccount)));
     };
 
     var done = function () {