保持原始的12列引导，不要自定义它。你唯一需要做的修改是一些css之后的原始引导响应css，像这样:

下面的代码已经为Bootstrap 2.3.2进行了测试:

<style type="text/css">
/* start of modification for 5 columns */
@media (min-width: 768px){
    .fivecolumns .span2 {
        width: 18.297872340425532%;
        *width: 18.2234042553191494%;
    }
}
@media (min-width: 1200px) {
    .fivecolumns .span2 {
        width: 17.9487179487179488%;
        *width: 17.87424986361156592%;
    }
}
@media (min-width: 768px) and (max-width: 979px) {
    .fivecolumns .span2 {
        width: 17.79005524861878448%;
        *width: 17.7155871635124022%;
    }
}
/* end of modification for 5 columns */
</style>

和html:

<div class="row-fluid fivecolumns">
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui. </p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui. </p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
</div>

注意:即使span2乘以5不等于12列，你明白了吧:)

可以在这里找到一个工作示例http://jsfiddle.net/v3Uy5/6/

如何在引导中添加5列网格

.col-lg-1-5,.col-md-1-5,.col-sm-1-5,.col-xs-1-5{min-height:1px;padding-left:15px;padding-right:15px;position:relative; width:100%;box-sizing:border-box;} .item{width:100%;height:100px; background-color:#cfcfcf;} .col-xs-1-5{width: 20%;float:left;} } @media (min-width: 767px){ .col-sm-1-5{width: 20%;float:left;} } @media (min-width: 992px){ .col-md-1-5{width: 20%;float:left;} } @media (min-width: 1200px){ .col-lg-1-5{width: 20%;float:left;} } <div class="row"> <div class="col-sm-1-5"> <div class="item">Item 1</div> </div> <div class="col-sm-1-5"> <div class="item">Item 2</div> </div> <div class="col-sm-1-5"> <div class="item">Item 3</div> </div> <div class="col-sm-1-5"> <div class="item">Item 4</div> </div> <div class="col-sm-1-5"> <div class="item">Item 5</div> </div> </div>

创建5个类为col-sm-2的元素，并在第一个元素中添加类为col-sm-offset-1

附注:这将不是全宽度的(它将从屏幕的左右略微缩进)

代码应该看起来像这样

<div class="col-sm-2 col-sm-offset-1"></div>
<div class="col-sm-2"></div>
<div class="col-sm-2"></div>
<div class="col-sm-2"></div>
<div class="col-sm-2"></div>

在Bootstrap 3中启用5列的另一种方法是修改Bootstrap默认使用的12列格式。然后创建一个20列的网格(在Bootstrap网站上使用自定义或使用LESS/SASS版本)。

要在引导网站上进行自定义，请访问自定义和下载页面，将变量@grid-columns从12更新为20。然后，您将能够创建4以及5列。

在我看来，像这样使用Less语法更好。 这个答案是基于@fizzix的回答

这样列使用用户可能覆盖的变量(@grid-gutter-width, media breakpoints)， 5列的行为与12列网格的行为匹配。

/*
 * Special grid for ten columns, 
 * using its own scope 
 * so it does not interfere with the rest of the code
 */

& {
    @import (multiple) "../bootstrap-3.2.0/less/variables.less";
    @grid-columns: 5;
    @import  (multiple) "../bootstrap-3.2.0/less/mixins.less";

    @column: 1;
    .col-xs-5ths {
        .make-xs-column(@column);
    }

    .col-sm-5ths {
        .make-sm-column(@column);
    }

    .col-md-5ths {
        .make-md-column(@column);
    }

    .col-lg-5ths {
        .make-lg-column(@column);
    }
}

/***************************************/
/* Using default bootstrap now
/***************************************/

@import  (multiple) "../bootstrap-3.2.0/less/variables.less";
@import  (multiple) "../bootstrap-3.2.0/less/mixins.less";

/* ... your normal less definitions */

五列显然不是bootstrap设计的一部分。

但是对于Bootstrap v4 (alpha)，有两件事可以帮助处理复杂的网格布局

Flex (http://v4-alpha.getbootstrap.com/getting-started/flexbox/)，新的元素类型(官方- https://www.w3.org/TR/css-flexbox-1/) 响应式实用程序(http://v4-alpha.getbootstrap.com/layout/responsive-utilities/)

简单来说，我在用

<style>
.flexc { display: flex; align-items: center; padding: 0; justify-content: center; }
.flexc a { display: block; flex: auto; text-align: center; flex-basis: 0; }
</style>
<div class="container flexc hidden-sm-down">
  <!-- content to show in MD and larger viewport -->
  <a href="#">Link/Col 1</a>
  <a href="#">Link/Col 2</a>
  <a href="#">Link/Col 3</a>
  <a href="#">Link/Col 4</a>
  <a href="#">Link/Col 5</a>
</div>
<div class="container hidden-md-up">
  <!-- content to show in SM and smaller viewport, I don't think 5 cols in smaller viewport are gonna be alright :) -->
</div>

不管是5 7 9 11 13还是其他概率，都没问题。 我非常确定12网格标准能够服务于90%以上的用例——所以让我们以这种方式设计——也更容易开发!

flex教程在这里“https://css-tricks.com/snippets/css/a-guide-to-flexbox/”