<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.css"
rel="stylesheet">
<style>
.row{
overflow:hidden;
height:40px;
margin-left:20px;
margin-top:20px;
border:1px solid red;
width:1000px;
line-height:40px;
vertical-align:top;
}
</style>
</head>
<body>
<form class="row form-inline">
<div class="form-group">
<span>这是一行</span>
<input type="text" class=""></div>
<div class="form-group">
<span>姓名</span>
<select name="">
<option value="请选择" selected="selected">性别</option>
</select>
<select id="user_address_building" name="" onchange="findAllUnits()" >
<option value="1">1</option>
<option value="请选择" selected="selected">年龄</option>
</select>
<select id="" name="" >
<option value="请选择" selected="selected">地址</option>
</select>
</div>
<div class="form-group">
<span>联系</span>
<select id="" name="">
<option value="请选择" selected="selected">请选择</option>
</select>
</div>
<div class="form-group">
<span>编号</span>
<input type="text" name="">
<button type="submit">
<span class="">按钮</span>
</button>
</div>
</form>
</body>
</html>建议你把所有网页代码贴出来，你这个片段贴出来都和你截图不一致。
display:inline-block
input,
select { vertical-align: middle; }.form-group{
text-align:center;}