谷歌浏览器F12，或者右键检查：
function doPrint(){ var head_str = "<html><head><title></title></head><body>"; //先生成头部 var foot_str = "</body></html>"; //生成尾部 var older = document.body.innerHTML; //var new_str = document.getElementById('wrapper').innerHTML; //获取指定打印区域 var new_str = document.getElementsByClassName('blog-content-box')[0].innerHTML; //获取指定打印区域 var old_str = document.body.innerHTML; //获得原本页面的代码 document.body.innerHTML = head_str + new_str + foot_str; //构建新网页 window.print(); //打印刚才新建的网页 document.body.innerHTML = older; //将网页还原 return false; };doPrint();10.16更新： 格式完美：
(function(){ $("#side").remove(); $("#comment_title, #comment_list, #comment_bar, #comment_form, .announce, #ad_cen, #ad_bot").remove(); $(".nav_top_2011, #header, #navigator").remove(); $(".csdn-side-toolbar,.template-box,.reward-user-box").remove(); $(".p4course_target, .comment-box, .recommend-box, #csdn-toolbar, #tool-box,#dmp_ad_58").remove(); $("aside").remove(); $(".tool-box").remove(); $("main").css('display','content'); $("main").css('float','left'); $("#mainBox").css('width','1048px'); $("#mainBox").css('margin-left','0px'); $("#mainBox").css('margin-right','0px'); //$("[class='main_father clearfix d-flex justify-content-center']").css("width","1048px"); $(".main_father.clearfix.d-flex.justify-content-center").css("width","1048px"); window.print(); $("tool-box").remove(); })();