<div id='table-cont' style="max-height: 150px;width: 540px;overflow: scroll;">
<table>
<thead>
<tr align="center" style="background: #dcdcdc;">
<th style="width:100px;">用户编号</th>
<th>试用时间</th>
<th>转正时间</th>
<th>性别</th>
<th>姓名拼音</th>
<th>生日时间</th>
<th>民族</th>
<th>身高</th>
</tr>
</thead>
<tbody>
<tr>
<td>2000001</td>
<td>1997-3-13</td>
<td>1997-3-13</td>
<td>1</td>
<td>WZJ</td>
<td>1965-3-13</td>
<td>汉</td>
<td>171</td>
</tr>
<tr>
<td>2000045</td>
<td>2001-2-15</td>
<td>2001-3-15</td>
<td>0</td>
<td>WY</td>
<td>1978-8-5</td>
<td>汉</td>
<td>162</td>
</tr>
<tr>
<td>2000046</td>
<td>2001-2-23</td>
<td>2001-3-23</td>
<td>0</td>
<td>LQ</td>
<td>2001-2-23</td>
<td>汉</td>
<td>171</td>
</tr>
<tr>
<td>2000046</td>
<td>2001-2-23</td>
<td>2001-3-23</td>
<td>0</td>
<td>LQ</td>
<td>2001-2-23</td>
<td>汉</td>
<td>171</td>
</tr>
<tr>
<td>2000046</td>
<td>2001-2-23</td>
<td>2001-3-23</td>
<td>0</td>
<td>LQ</td>
<td>2001-2-23</td>
<td>汉</td>
<td>171</td>
</tr>
<tr>
<td>2000046</td>
<td>2001-2-23</td>
<td>2001-3-23</td>
<td>0</td>
<td>LQ</td>
<td>2001-2-23</td>
<td>汉</td>
<td>171</td>
</tr>
<tr>
<td>2000046</td>
<td>2001-2-23</td>
<td>2001-3-23</td>
<td>0</td>
<td>LQ</td>
<td>2001-2-23</td>
<td>汉</td>
<td>171</td>
</tr>
<tr>
<td>2000046</td>
<td>2001-2-23</td>
<td>2001-3-23</td>
<td>0</td>
<td>LQ</td>
<td>2001-2-23</td>
<td>汉</td>
<td>171</td>
</tr>
</tbody>
</table>
</div>
<script type="text/javascript">
var tableCont = document.querySelector('#table-cont');
function scrollHandle (event){
var scrollTop = event.target.scrollTop;
event.target.querySelector('thead').style.transform = 'translateY(' + scrollTop +'px)';
}
tableCont.addEventListener('scroll',scrollHandle);
</script>当然还有一种方法可以实现，就是position：sticky，这是css定位新增属性
