主要设置两行css代码
page-``break``-before: auto;
page-``break``-after: always;
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<style>
.A4 {
page-break-before: auto;
page-break-after: always;
}
</style>
<body>
<div class="A4">第一页</div>
<div class="A4">第二页</div>
<input onclick="setPageBreak()" id="biuuu_button" type="button" value="打印"></input>
</body>
</html>
<script type="text/javascript">
function setPageBreak(){
window.print();
}
</script>