<script type="text/javascript">

    var _qrContent = 'https://www.xuanmoban.com',  /**二维码url地址**/

    _qrLogo = 'https://monst.cc/tx.jpg',  /**二维码中间logo,必须是网络地址**/

    _qrWidth = 180, /**二维码宽度**/

    _qrHeight = 180, /**二维码高度**/

    _qrType = 'url';

    if (!_qrContent) var _qrContent = escape(document.location.href);

    document.write(unescape("%3Cscript src='http://qrcode.leipi.org/js.html?qw=" + _qrWidth + "&qh=" + _qrHeight + "&qt=" + _qrType + "&qc=" + escape(_qrContent) + "&ql=" + escape(_qrLogo) + "' type='text/javascript'%3E%3C/script%3E"));

    </script>

只需要将地址换成你自己的域名，然后将代码放到合适的位置即可