你应该在父元素上使用position: relative和text-align: center，然后在你想居中的子元素上使用display: inline-block。这是一个简单的CSS设计模式，适用于所有主流浏览器。下面是一个示例或查看CodePen示例。

p { text-align: left; } .container { position: relative; display: block; text-align: center; } /* Style your object */ .object { padding: 10px; color: #ffffff; background-color: #556270; } .centerthis { display: inline-block; } <div class="container"> <p>Aeroplanigera Mi Psychopathologia Subdistinctio Chirographum Intuor Sons Superbiloquentia Os Sors Sesquiseptimus Municipatio Archipresbyteratus O Conclusio Compedagogius An Maius Septentrionarius Plas Inproportionabilit Constantinopolis Particularisticus.</p> <span class="object centerthis">Something Centered</span> <p>Aeroplanigera Mi Psychopathologia Subdistinctio Chirographum Intuor Sons Superbiloquentia Os Sors Sesquiseptimus Municipatio Archipresbyteratus O Conclusio Compedagogius.</p> </div>

CSS, HTML: Div.mydiv{宽度:200px;Margin: 0 auto} < div class = " mydiv”> 我在中间 < / div >

您的图表还显示了块级元素(通常是div)，而不是内联元素。

在我的头顶，在FF2+/Safari3+/IE7+中支持min-width。可以在IE6上使用巧妙的CSS，或者简单的JS。

问题的标题和内容实际上是不同的，所以我将发布两个解决方案，使用Flexbox。

我猜在IE8和IE9完全被摧毁之前，Flexbox将取代/添加到当前的标准解决方案中;)

检查当前flexbox的浏览器兼容性表

单一的元素

.container { 显示:flex; justify-content:中心; ｝ < div class = "容器" > < img src = " http://placehold.it/100x100 " > < / div >

多个元素，但只以一个为中心

默认行为是flex-direction: row，将所有子项对齐在一行中。将其设置为flex-direction: column将有助于堆叠的行。

.container { display: flex; flex-direction: column; } .centered { align-self: center; } <div class="container"> <p>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. </p> <div class="centered"><img src="http://placehold.it/100x100"></div> <p>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. </p> </div>

margin-left:auto和margin-right:auto的用法在某些情况下可能不起作用。这里有一个解决方案，它总是有效的。您指定一个所需的宽度，然后将左距设置为剩余宽度的一半。

    <div style="width:80%; margin-left:calc(10%);">
        your_html
    </div>

请使用下面的代码，您的div将在中心。

.class-name {
    display:block;
    margin:0 auto;
}

在你的html文件中，你写:

<div class="banner">
  Center content
</div>

你写的CSS文件:

.banner {
display: block;
margin: auto;
width: 100px;
height: 50px;
}

对我有用。