同级div设置display:inline-block，父级div强制不换行
<html>
<head></head>
<body>
<div id="container">
<div class="lable">测试测试</div>
<div class="lable">测试测试</div>
<div class="lable">测试测试</div>
<div class="lable">测试测试</div>
<div class="lable">测试测试</div>
<div>
</body>
<style>
#container {
400px;
height: 200px;
background-color: red;
overflow: auto;
white-space: nowrap;
}
.lable {
100px;
background-color: blue;
display: inline-block;
}
</style>
</html>