diff --git a/static/templates/chat_main.html b/static/templates/chat_main.html
index a399bdb..180b0df 100644
--- a/static/templates/chat_main.html
+++ b/static/templates/chat_main.html
@@ -738,22 +738,26 @@
                     }
                     $.get("/2/messagesPages",params,function(res){
                         let msgList=res.result.list;
-                        let existKeys={};
+                        let existIds={};
+                        var existList=[];
                         for(let i=0;i<_this.msgList.length;i++){
                             var m=_this.msgList[i];
-                            if(m.id){
-                                existKeys['id_'+m.id]=true;
-                            }
-                            if(m.time && m.content){
-                                existKeys[m.time+'_'+m.content]=true;
+                            if(m.id) existIds[m.id]=true;
+                            if(m.time) existList.push({time:new Date(m.time).getTime(),content:m.content});
+                        }
+                        function isDuplicate(item){
+                            if(item.id && existIds[item.id]) return true;
+                            var t=new Date(item["create_time"]).getTime();
+                            var c=replaceContent(item["content"]);
+                            for(var j=0;j<existList.length;j++){
+                                if(existList[j].content===c && Math.abs(existList[j].time-t)<=3000) return true;
                             }
+                            return false;
                         }
                         let newMsgs=[];
                         for(let i=msgList.length-1;i>=0;i--){
                             let item=msgList[i];
-                            var key1=item.id?'id_'+item.id:'';
-                            var key2=item["create_time"]+'_'+replaceContent(item["content"]);
-                            if((key1 && existKeys[key1]) || existKeys[key2]) continue;
+                            if(isDuplicate(item)) continue;
                             if (item["mes_type"] == "kefu") {
                                 item.is_kefu = true;
                                 item.avator=item["kefu_avator"];
diff --git a/static/templates/chat_page.html b/static/templates/chat_page.html
index b1be921..b06ba38 100644
--- a/static/templates/chat_page.html
+++ b/static/templates/chat_page.html
@@ -238,7 +238,6 @@
             isIframe:false,
             kefuInfo:{},
             showLoadMore:false,
-            pollTimer:null,
             messages:{
                 page:1,
                 pagesize:5,
@@ -463,59 +462,10 @@
                     }
                     if(_this.messages.page==1){
                         _this.scrollBottom();
-                        _this.startPollMessages();
                     }
                     _this.messages.page++;
                 });
             },
-            startPollMessages:function(){
-                let _this=this;
-                if(_this.pollTimer) return;
-                _this.pollTimer=setInterval(function(){
-                    if(!_this.visitor||!_this.visitor.visitor_id) return;
-                    let params={
-                        page:1,
-                        pagesize: 20,
-                        visitor_id: _this.visitor.visitor_id,
-                    }
-                    $.get("/2/messagesPages",params,function(res){
-                        let msgList=res.result.list;
-                        let existKeys={};
-                        for(let i=0;i<_this.msgList.length;i++){
-                            var m=_this.msgList[i];
-                            if(m.id){
-                                existKeys['id_'+m.id]=true;
-                            }
-                            if(m.time && m.content){
-                                existKeys[m.time+'_'+m.content]=true;
-                            }
-                        }
-                        let newMsgs=[];
-                        for(let i=msgList.length-1;i>=0;i--){
-                            let item=msgList[i];
-                            var key1=item.id?'id_'+item.id:'';
-                            var key2=item["create_time"]+'_'+replaceContent(item["content"]);
-                            if((key1 && existKeys[key1]) || existKeys[key2]) continue;
-                            if (item["mes_type"] == "kefu") {
-                                item.is_kefu = true;
-                                item.avator=item["kefu_avator"];
-                            } else {
-                                item.is_kefu = false;
-                                item.avator=item["visitor_avator"];
-                            }
-                            item.time = item["create_time"];
-                            item.content=replaceContent(item["content"]);
-                            newMsgs.push(item);
-                        }
-                        if(newMsgs.length>0){
-                            for(let i=0;i<newMsgs.length;i++){
-                                _this.msgList.push(newMsgs[i]);
-                            }
-                            _this.scrollBottom();
-                        }
-                    });
-                },5000);
-            },
             scrollBottom:function(){
                 var _this=this;
                 this.$nextTick(function(){
@@ -765,12 +715,6 @@
                 this.scrollBottom();
             },
         },
-        beforeDestroy:function(){
-            if(this.pollTimer){
-                clearInterval(this.pollTimer);
-                this.pollTimer=null;
-            }
-        },
         mounted:function() {
             document.addEventListener('paste', this.onPasteUpload)
             document.addEventListener('scroll',this.textareaBlur)