你应该尝试使用"display:block;"到tbody，因为现在它是内联块，为了设置高度，元素应该是"block"

根据@Roko C. Buljan的回答，如果你尝试添加行跨度，当你滚动时，只有第一个th会被固定。

.tableFixHead { overflow: auto; height: 100px; } .tableFixHead thead th { position: sticky; top: 0; z-index: 1; } /* Just common table stuff. Really. */ table { border-collapse: collapse; width: 100%; } th, td { padding: 8px 16px; } th { background:#eee; } <div class="tableFixHead"> <table> <thead> <tr> <th rowspan="3">TH 1</th> <th>TH 2.1</th> <th>TH 3.1</th> </tr> <tr > <th>TH 2.2</th> <th>TH 3.2</th> </tr> <tr > <th>TH 2.3</th> <th>TH 3.3</th> </tr> </thead> <tbody> <tr><td>A1</td><td>A2</td><td>A3</td></tr> <tr><td>B1</td><td>B2</td><td>B3</td></tr> <tr><td>C1</td><td>C2</td><td>C3</td></tr> <tr><td>D1</td><td>D2</td><td>D3</td></tr> <tr><td>E1</td><td>E2</td><td>E3</td></tr> </tbody> </table> </div>

如果你想固定行跨度，你可以添加这行

.tableFixHead thead tr:nth-child(2) th {
    top: 34px; /* change the number according to your need  */
}

.tableFixHead thead tr:nth-child(3) th {
    top: 68px; /* change the number according to your need  */
}

作为示例，您可以检查这个片段

.tableFixHead { overflow: auto; height: 200px; } .tableFixHead thead th { position: sticky; top: 0; z-index: 1; } .tableFixHead thead tr:nth-child(2) th { top: 34px; /* change the number according to your need */ } .tableFixHead thead tr:nth-child(3) th { top: 68px; /* change the number according to your need */ } /* Just common table stuff. Really. */ table { border-collapse: collapse; width: 100%; } th, td { padding: 8px 16px; } th { background:#eee; } <div class="tableFixHead"> <table> <thead> <tr> <th rowspan="3">TH 1</th> <th>TH 2.1</th> <th>TH 3.1</th> </tr> <tr > <th>TH 2.2</th> <th>TH 3.2</th> </tr> <tr > <th>TH 2.3</th> <th>TH 3.3</th> </tr> </thead> <tbody> <tr><td>A1</td><td>A2</td><td>A3</td></tr> <tr><td>B1</td><td>B2</td><td>B3</td></tr> <tr><td>C1</td><td>C2</td><td>C3</td></tr> <tr><td>D1</td><td>D2</td><td>D3</td></tr> <tr><td>E1</td><td>E2</td><td>E3</td></tr> </tbody> </table> </div>

如果你用n -child(number)手动指定number，上面的代码段将正常工作

对于满高的表格(页面滚动，而不是表格)

注意:我移动整个<thead>…</ header >因为在我的例子中，我有两行(标题和过滤器)

使用JS (jQuery)

$( function() {

            let marginTop = 0; // Add margin if the page has a top nav-bar
            let $thead = $('.table-fixed-head').find('thead');
            let offset = $thead.first().offset().top - marginTop;
            let lastPos = 0;

            $(window).on('scroll', function () {

                if ( window.scrollY > offset )
                {
                    if ( lastPos === 0 )
                    {
                        // Add a class for styling
                        $thead.addClass('floating-header');
                    }

                    lastPos = window.scrollY - offset;
                    $thead.css('transform', 'translateY(' + ( lastPos ) + 'px)');
                }
                else if ( lastPos !== 0 )
                {
                    lastPos = 0;
                    $thead.removeClass('floating-header');
                    $thead.css('transform', 'translateY(' + 0 + 'px)');
                }
            });
});

CSS(仅用于样式)

 thead.floating-header>tr>th {
       background-color: #efefef;
 }

thead.floating-header>tr:last-child>th {
       border-bottom: 1px solid #aaa;
}

更新

对于更新的和仍然维护的库尝试jquery。而不是floatThead(正如Bob Jordan在评论中提到的)。

旧的答案

这是一个很古老的答案，下面提到的图书馆已经不再维护了。

我在GitHub上使用StickyTableHeaders，它像魅力一样工作!

我必须添加这个css，使头部不透明。

table#stickyHeader thead {
  border-top: none;
  border-bottom: none;
  background-color: #FFF;
}

清洁解决方案(仅适用于CSS)

.table-fixed tbody {
    display:block;
    height:85vh;
    overflow:auto;
}
.table-fixed thead, .table-fixed tbody tr {
    display:table;
    width:100%;
}


<table class="table table-striped table-fixed">
    <thead>
        <tr align="center">
            <th>Col 1</th>
            <th>Col 2</th>
            <th>Col 3</th>
            <th>Col 4</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Content 1</td>
            <td>Content 1</td>
            <td>Content 1</td>
            <td>Content 1</td>
        </tr>
        <tr>
            <td>Longer Content 1</td>
            <td>Longer Content 1</td>
            <td>Longer Content 1</td>
            <td>Longer Content 1</td>
        </tr>
    </tbody
</table

<style>

thead, tbody
{
    display: block;
}

tbody 
{
   overflow: auto;
   height: 100px;
}

th,td
{
    width: 120px;
}

</style>

<table class="table table-bordered table-striped">
    <thead style="background-color:lightgreen">
        <tr>
            <th>Id</th><th>Name</th><th>Roll</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>1</td>
            <td>Shahriar</td>
            <td>12</td>
        </tr>
        <tr>
            <td>1</td>
            <td>Shahriar</td>
            <td>12</td>
        </tr>
        <tr>
            <td>1</td>
            <td>Shahriar</td>
            <td>12</td>
        </tr>
        <tr>
            <td>1</td>
            <td>Shahriar</td>
            <td>12</td>
        </tr>
        <tr>
            <td>1</td>
            <td>Shahriar</td>
            <td>12</td>
        </tr>
        <tr>
            <td>1</td>
            <td>Shahriar</td>
            <td>12</td>
        </tr>
        <tr>
            <td>1</td>
            <td>Shahriar</td>
            <td>12</td>
        </tr>
    </tbody>
</table>