<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Wsscat DEMO</title>
</head>
<body>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
<div class="box"></div>
</body>
<style>
body {
margin: 0;
padding: 0;
}
.box {
float: left;
width: 30%;
margin-top: 10px;
margin-left: 2.5%;
height: 0;
padding-bottom: 33.98%;//或者padding-top
background-color: #dbe0e4;
background-image: url(1.jpg);//图片不要用![技术分享]()
标签，用这两个属性配合会更好控制图片缩放
background-size: cover;
}
</style>
</html>原文：http://www.cnblogs.com/luckyuns/p/6404815.html