float:right;没有效果的解决方法 要点1：在父级div 加 position: relative; 要点2：在子级div 加 position:absolute;right:0px;
.top { position: relative; background: rgba(255, 77, 59, 1); display: flex; } <div class="top" style=" height: 60px" > <div class="left1" style="margin-left:15.5px; margin-top:17.5px; margin-bottom: 12.5px " > <img src="../../static/top/logo .png" alt="logo" style="width: 89px; height: 26px; " /> </div> <img src="../../static/top/menu.png" alt="menu" style="width: 13.5px; height: 10.5px; margin-right:16px; margin-top:25px; margin-bottom: 24.5px; position:absolute; right:0px; " /> </div>