diff --git a/src/main/java/com/github/sd4324530/fastweixin/message/CustomMsg.java b/src/main/java/com/github/sd4324530/fastweixin/message/CustomMsg.java
index fa525752fd200f7c55942359784ffce46c863b91..094f7d7f1b8c7fd96b94e0c5f3bf48c402a873f3 100644
--- a/src/main/java/com/github/sd4324530/fastweixin/message/CustomMsg.java
+++ b/src/main/java/com/github/sd4324530/fastweixin/message/CustomMsg.java
@@ -1,11 +1,16 @@
 package com.github.sd4324530.fastweixin.message;
 
 import com.github.sd4324530.fastweixin.message.util.MessageBuilder;
+import com.github.sd4324530.fastweixin.util.StrUtil;
 
 public class CustomMsg extends BaseMsg {
 
     private String kfAccount;
 
+    public CustomMsg(){
+
+    }
+
     public CustomMsg(String kfAccount) {
         this.kfAccount = kfAccount;
     }
@@ -22,9 +27,12 @@ public class CustomMsg extends BaseMsg {
     public String toXml() {
         MessageBuilder mb = new MessageBuilder(super.toXml());
         mb.addData("MsgType", RespType.KF);
-        mb.append("<TransInfo>\n");
-        mb.addData("KfAccount", kfAccount);
-        mb.append("</TransInfo>\n");
+        //可以不指定客服
+        if(StrUtil.isNotBlank(kfAccount)) {
+            mb.append("<TransInfo>\n");
+            mb.addData("KfAccount", kfAccount);
+            mb.append("</TransInfo>\n");
+        }
         mb.surroundWith("xml");
         return mb.toString();
     }