SOURCE

<p><strong>图片自身</strong></p>
<div class="overflow">
    <div class="pos"></div>
</div>
<p><strong>图片自身transform</strong></p>
<div class="overflow">
    <div class="pos transform"></div>
</div>
<div class="overflow transform">
    <div class="pos"></div>
</div>
<p><strong>overflow容器和图片之间内嵌元素transform</strong></p>
<div class="overflow">
    <div class="transform">
        <div class="pos"></div>
    </div>
</div>

.overflow {
    width: 200px;
    height: 200px;
    border: 2px solid red;
    overflow: hidden;
}

.overflow img {
    position: absolute;
}

.transform {
    -webkit-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
}
.pos{
    width: 300px;
    height: 300px;
    background: burlywood;
    border: 3px solid skyblue;
}