加一个<template #empty>就可以
<el-form-item label="设置物流品牌" prop="logistics_data">
<el-table-column align="center" width="540" prop="brand_details" label="品牌介绍"/>
<template #empty>
<div style="width: 100%; height: 144px;display: flex; flex-direction: column; justify-
content: center;align-items: center">
<img style="width: 60px;height:60px;"src="../../../../../assets/images/Temporarilynodata.png" alt="">
<div>暂无数据</div>
</div>
</template>
</el-table>
<template #empty>标签里面可以自定义任何的样式 根据需求更改即可