<style type="text/css"> .box { width: 347px; height: 300px; border: 20px solid red; margin: 50px auto; /* 设置边框图片 */ border-image-source: url("2.png"); /* 边框图片裁切 : 不需要带单位*/ border-image-slice: 20; /* 设置边框图片的平铺方式 */ /* border-image-repeat: stretch; */ border-image-repeat: round; /* border-image-repeat: repeat; */ border-image-width: 20px; } </style>