代码更改前

 <img class="img" :src="`@/assets/images/${syntheticalGrade}.png`" />data(){return{syntheticalGrade:"1"}
}

效果图：

解决代码

 <img class="img" :src="require(`@/assets/images/${syntheticalGrade}.png`)" />data(){return{syntheticalGrade:"1"}
}

效果图：