diff --git a/demo/index.html b/demo/index.html
index c7dfbfe..a9fbe9a 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -17,6 +17,7 @@ <h1>cxPicker 级联选择器</h1>
   <div class="wrap">
 
     <h2>示例</h2>
+    <p>请使用开发者工具模拟手机设备进行浏览。</p>
 
     <fieldset>
       <legend>单列选择</legend>