<el-table-column label="图片" width="100" align="center">
        <template slot-scope="scope">
           <el-image style="width: 80px; height: 80px; border-radius: 10%" :src="scope.row.item_img" fit="cover"></el-image>
        </template>
      </el-table-column>

先这样，然后这样，然后就显示了。

<el-image style="width: 80px; height: 80px; border-radius: 10%" :src="scope.row.item_img" fit="cover"></el-image>