diff --git a/game.js b/game.js
index 1704e09..06f333c 100644
--- a/game.js
+++ b/game.js
@@ -333,6 +333,8 @@ function Game(id,params){
         var fn = function(){
             var stage = _stages[_index];
             _context.clearRect(0,0,_.width,_.height);		//清除画布
+            _context.fillStyle = '#000000';
+            _context.fillRect(0,0,_.width,_.height);
             f++;
             if(stage.timeout){
                 stage.timeout--;