diff --git a/static/js/components/app-main/index.js b/static/js/components/app-main/index.js
index 3eb408a..e64e42e 100644
--- a/static/js/components/app-main/index.js
+++ b/static/js/components/app-main/index.js
@@ -194,8 +194,19 @@ module.exports = Vue.component('app-main', {
     }, false);
 
     var step = 0;
+    var timestamp = Date.now();
 
     ipc.on('emulator', function (event, type, project, data){
+      var now = Date.now();
+
+      if (now - timestamp > 1000) {
+        step = 0;
+      }
+
+      timestamp = now;
+
+      step++;
+
       var delay = step * 16;
       var runtime = window.AppRuntime[project.name];
 
@@ -203,20 +214,17 @@ module.exports = Vue.component('app-main', {
         switch (type) {
           case 'data':
             data += '';
-            step++;
             break;
           case 'error':
             data = '执行出现错误: ' + data;
-            step = 0;
             break;
           case 'close':
             data = '\u001b[32m命令执行完毕\u001b[39m\r\n';
-            step = 0;
             break;
         }
 
         setTimeout(function (){
-          runtime.xterm.write(data + '');
+          runtime.xterm.write(data);
           scroll(runtime.xterm);
         }, delay);
       } else {