table 随td固宽

//给table,td定最小宽度

table.sheetbody{table-layout: fixed;min- 100%;}
td,th{
    min- 100px;
}


 <table border="1" cellspacing="0" cellpadding="0" class="sheetbody">
  <colgroup>
      <col width="200" span="2" style="background:#3769c3;">
    <col width="200" style="background:#628ad2;">
    <col width="100" span="5">
  </colgroup>
  <tr>
    <th colspan="2" rowspan="2" scope="col" class="date">Date ending on</th>
    <th colspan="2" scope="col">PRC</th>
    <th rowspan="2" scope="col">&nbsp;</th>
    <th colspan="2" scope="col">OVERSEAS</th>
  </tr>
  <tr>
    <!--prc-->
    <th scope="col"><div class="elli">wk end<span>6/7/2019</span></div></th>
    <th scope="col"><div class="elli">wk end<span>6/7/2019</span></div></th>
    
    <!--overseas-->
    <th scope="col"><div class="elli">wk end<span>6/7/2019</span></div></th>
    <th scope="col"><div class="elli">wk end<span>6/7/2019</span></div></th>
  </tr>
 <tr>
    <td><p>Committed - Outflow</p></td>
    <td>22</td>
    <td>11</td>
    <td>&nbsp;</td>
    
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>