<!DOCTYPE html> <style type="text/css"> .bar { position: fixed; z-index: 100000000; width: 35px; right: 0; top: 0; bottom: 0; background-color: red; } </style> <div class="bar" style="padding-top:10px;"> 此区域固定在窗口右侧 </div> <div style="padding:1000px 0px;text-align:center;">下拉滚动条，右侧区域不受影响</div>