diff --git a/main.js b/main.js
index 4e7bcec1..2305a77f 100644
--- a/main.js
+++ b/main.js
@@ -224,6 +224,10 @@ document.ontouchstart = function() {
 main.dom.data.onmousedown = function (e) {
     try {
         e.stopPropagation();
+        if(e.button==1){// 把鼠标中键绑定为ESC
+            core.keyUp(27);
+            return;
+        }
         var loc = main.core.getClickLoc(e.clientX, e.clientY);
         if (loc == null) return;
         var x = parseInt(loc.x / loc.size), y = parseInt(loc.y / loc.size);