diff --git a/static/templates/chat_main.html b/static/templates/chat_main.html
index 660d4cd..4e17061 100644
--- a/static/templates/chat_main.html
+++ b/static/templates/chat_main.html
@@ -786,22 +786,26 @@
                     }
                     $.get("/ai-css/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 4179961..bfa4c3a 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,
@@ -463,7 +462,6 @@
                     }
                     if(_this.messages.page==1){
                         _this.scrollBottom();
-                        _this.startPollMessages();
                     }
                     _this.messages.page++;
                 });
@@ -765,12 +763,6 @@
                 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)