element图片回显是通过修改file-list属性的url属性实现的。

  <!-- 图片上传 -->
        <el-form-item label="景区图片" prop="s_img">
          <el-upload
            list-type="picture-card"
            :action="网址"
            :on-change="handleChange"
            :before-remove="beforeRemove"
            :on-preview="handlePictureCardPreview"
            fit="cover"
            :file-list="绑定值"
            multiple
            :limit="1"
            name="file"
          >
            <el-icon class="avatar-uploader-icon">
              <Plus />
            </el-icon>
          </el-upload>
          <el-dialog v-model="dialogVisibles" width="300">
            <img
              w-full
              :src="dialogImageUrl"
              alt="Preview Image"
              style="width: 80%; margin: auto"
            />
          </el-dialog>
        </el-form-item>

回显：

绑定值 = [
    {
      url: 图片路径,
    }
  ];

 效果展示：