<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
</style>
.wrapper {
200px;
height: 200px;
background: skyblue;
font-size:0
}
.wrapper:before {
content: '.';
display: inline-block;
vertical-align: middle;
height: 100%;
}
.content {
display: inline-block;
text-align: center;
font-size:16px
}
</style>
</head>
<body>
<div class="wrapper">
<div class="content">多行文字居中 多行文字居中 多行文字居中 </div>
</div>
</body>
</html>