效果

demo
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<style>
.contain {
padding: 0;
margin: 0;
}
.header {
position: absolute;
height: 60px;
top: 0;
right: 0;
left: 0;
background: #f00;
}
.main {
position: absolute;
top: 60px;
bottom: 60px;
right: 0;
left: 0;
overflow: auto;
background: #00ff00;
}
.footer {
position: absolute;
height: 60px;
bottom: 0px;
right: 0;
left: 0;
background: #00f;
}
</style>
<title>Document</title>
</head>
<body>
<div class="contain">
<div class="header">
header
</div>
<div class="main">
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
<div>
mainmainmain
</div>
</div>
<div class="footer">
footer
</div>
</div>
</body>
</html>