<head>
<style>
        .test:hover::after {
            content: '';
            width: 120px;
            height: 120px;
            border: 5px solid white;
            background: url("图片URL") top center;
            background-size: 100% auto;
            position: absolute;
            top: 100px;
            left: 0;
            z-index: 99999;

        }
    </style>
</head>

<body>
    <div class="test">
        <p>2333</p>
    </div>
</body>