<div class="msg_desc">

<img style="max-width:100%;overflow:hidden;" src="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20480%20640'%3E%3C/svg%3E" loading='lazy' data-lazy-src="http:///upload/kindeditor/image/20140724/20140724172508_15817.jpg" alt="">

</div>

这里就把图片固定在msg_desc里面了，方便吧。