<div>
        <img src="引入的图片地址" alt="">
</div>

div{
    position:relative;
　 width: 100px;
    height: 100px;
    overflow:hidden;
}
 div img{
    position: absolute;
    top: 50%;
    left: 50%;
    display: block;
    min-width: 100%;
    min-height: 100%;
    transform:translate(-50%,-50%);
}

div{
　　width: 100px;
　　height: 100px;
}
div img{
    width: 100%;
    height: 100%;
    object-fit:cover;
}