如果你指定table-layout: fixed;在table元素上，那么td的样式应该生效。不过，这也会影响细胞的大小。

Sitepoint在这里稍微讨论了一下表格布局方法: http://reference.sitepoint.com/css/tableformatting

为什么会发生这种情况?

似乎w3.org的这部分建议文本溢出只适用于块元素:

11.1.  Overflow Ellipsis: the ‘text-overflow’ property

text-overflow      clip | ellipsis | <string>  
Initial:           clip   
APPLIES TO:        BLOCK CONTAINERS               <<<<
Inherited:         no  
Percentages:       N/A  
Media:             visual  
Computed value:    as specified  

MDN也是这么说的。

这个jsfiddle有您的代码(带有一些调试修改)，如果它应用于div而不是td，则可以正常工作。它还有我能很快想到的唯一解决方法，即将td的内容包装在包含div的块中。然而，对我来说，这看起来像是“丑陋的”标记，所以我希望其他人有更好的解决方案。测试的代码是这样的:

td, div { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; border: 1px solid red; width: 80px; } Works, but no tables anymore: <div>Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah.</div> Works, but non-semantic markup required: <table><tr><td><div>Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah.</div></td></tr></table>

这个版本可以在IE 9中运行。

http://jsfiddle.net/s27gf2n8/

<div style="display:table; table-layout: fixed; width:100%; " >
        <div style="display:table-row;">
            <div style="display:table-cell;">
                <table style="width: 100%; table-layout: fixed;">
                    <div style="text-overflow:ellipsis;overflow:hidden;white-space:nowrap;">First row. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
                </table>
            </div>
            <div style="display:table-cell;">
                Top right Cell.
            </div>
        </div>
        <div style="display:table-row;">
            <div style="display:table-cell;">
                <table style="width: 100%; table-layout: fixed;">
                    <div style="text-overflow:ellipsis;overflow:hidden;white-space:nowrap;">Second row - Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
                </table>
            </div>
            <div style="display:table-cell;">
                Bottom right cell.
            </div>
        </div>
    </div>

为清洁自动大小表与省略号

如果你可以抛弃表格标签，那么现代CSS有一个更干净(IMO)的解决方案:使用网格布局。

你只需要一个div或类似的东西来表示表格，里面有单元格，例如:

<div class="table">
  <div class="cell">text</div>
  <div class="cell">text</div>
  <div class="cell">text</div>
  <div class="cell">text</div>
</div>

现在，如果我想让它成为一个2x2的表格，那么它只是一个简单的例子，为网格定义两个自动大小的列:

.table {
  display: grid;
  grid-template-columns: auto auto;
}

对于单元格，你只需要多写几行CSS:

.cell {
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

完成工作!如果你需要确保一些列比其他列宽，那么使用fr单元或其他可用选项的列模板效果很好。

.table { 显示:网格; Grid-template-columns: auto auto; ｝ .cell { 文本溢出:省略; 溢出:隐藏; 空白:nowrap;} 边框:1px纯黑色; ｝ < div class = "表" > <div class="cell">long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long long < div class = "单元格" >文本< / div > < div class = "单元格" >文本< / div > < div class = "单元格" >文本< / div > < / div >

当它以表格宽度百分比为单位时，或者你不能在表格单元格上设置固定宽度。你可以应用table-layout: fixed;让它起作用。

table { table-layout: fixed; width: 100%; } td { text-overflow: ellipsis; white-space: nowrap; overflow: hidden; border: 1px solid red; } <table> <tr> <td>Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah.</td> <td>Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah. Lorem ipsum and dim sum yeah yeah yeah.</td> </tr> </table>

XML

<td><div>Your overflowing content here.</div></td>

CSS

td div
{
 max-height: 30vh;
 overflow: auto;
}

为了这个特定的目的而试图打乱整个表是没有意义的。是的，有时候如果你明确不想成为另一个600个div嵌套的Twitter/Facebook“开发者”，添加一个额外的元素是可以的。