效果图：

代码实现：

<template>
  <div class="merchantOrderManage">
    <el-table :data="tableNewData" :span-method="objectSpanMethod" border style="width: 100%; margin-top: 20px" :cell-class-name="tableRowClassName" :header-cell-style="isCenter">
      <el-table-column prop="id" label="订单号" width="140" align="center" fixed> </el-table-column>
      <el-table-column label="商品信息" width="350" fixed>
        <template slot-scope="scope">
          <div class="info_box">
            <div class="info_box_img">
              <img :src="scope.row.img" alt="" />
            </div>
            <div class="info_describe">
              <p class="text">
                <span>{{ scope.row.title }}</span>
              </p>
              <p class="attr">
                <span v-for="(itm, iid) in scope.row.goodsAttr" :key="iid">
                  <span>{{ itm.attrName }}：{{ itm.attrValue }}</span>
                </span>
              </p>
            </div>
          </div>
        </template>
      </el-table-column>
      <el-table-column prop="price" label="单价(元)" align="center" width="90"> </el-table-column>
      <el-table-column prop="num" label="购买数量" align="center" width="80"> </el-table-column>
      <el-table-column prop="total_payment" label="支付金额(元)" align="center" width="140"> </el-table-column>
      <el-table-column prop="name" label="用户名称" align="center" width="110"> </el-table-column>
      <el-table-column prop="phone" label="联系方式" align="center" width="115"> </el-table-column>
      <el-table-column prop="address" label="用户地址" width="160"> </el-table-column>
      <el-table-column prop="create_time" label="下单时间" align="center" width="160"></el-table-column>
      <el-table-column label="订单状态" align="center" width="80">
        <template slot-scope="scope">
          <div class="tip-tag">
            <el-tag type="info" v-if="scope.row.status === 0">已取消</el-tag>
            <el-tag v-if="scope.row.status === 1">待付款</el-tag>
            <el-tag type="primary" v-if="scope.row.status === 2">待发货</el-tag>
            <el-tag type="danger" v-if="scope.row.status == 3">待确认</el-tag>
            <el-tag type="warning" v-if="scope.row.status == 4">退货</el-tag>
            <el-tag type="success" v-if="scope.row.status == 5">退货邮寄</el-tag>
            <el-tag type="success" v-if="scope.row.status == 5">退货完成</el-tag>
            <el-tag type="success" v-if="scope.row.status == 5">已完成</el-tag>
          </div>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" width="140" fixed="right">
        <template slot-scope="scope">
          <el-button type="text" @click="deleteForm(scope.row)" size="mini">详情</el-button>
          <el-button type="text" @click="deleteForm(scope.row)" size="mini">发货</el-button>
        </template>
      </el-table-column>
    </el-table>

    <el-pagination @current-change="handleCurrentChange" :current-page="currentPage" :page-size="pagesize" layout="total, prev, pager, next, jumper" :total="total"> </el-pagination>
  </div>
</template>

<script>
export default {
  name: 'merchantOrderManage',
  components: {},
  data() {
    return {
      tableNewData: [],
      hoverOrderArr: [],
      OrderIndexArr: [],
      tableData: [
        {
          id: '16117282260421',
          total_payment: 2999.0,
          name: '王某某',
          phone: '18523652142',
          address: '黑龙江省 大庆市 萨尔图区 富强街道 大街13号',
          create_time: '2021-01-27 14:17:06',
          status: 1,
          list: [
            {
              price: 999.0,
              num: 1,
              img: 'https://img-tmdetail.alicdn.com/bao/uploaded///img.alicdn.com/bao/uploaded/O1CN01JmWCdR1k3fd9AWtmD_!!0-item_pic.jpg_160x160q90.jpg',
              title: '华为mate40pro 5G手机 亮黑色 8+256G全网通（碎屏险套餐）',
              goodsAttr: [
                {
                  attrName: '颜色',
                  attrValue: '亮黑色'
                },
                {
                  attrName: '运行内存',
                  attrValue: '8GB'
                },
                {
                  attrName: '机身存储',
                  attrValue: '256GB'
                }
              ]
            },
            {
              price: 1000,
              num: 2,
              img: 'https://img-tmdetail.alicdn.com/bao/uploaded///img.alicdn.com/bao/uploaded/O1CN01wfnm311k3fd483OAU_!!0-item_pic.jpg_160x160q90.jpg',
              title: '三星Galaxy Note20 Ultra 5G(SM-N9860)S Pen&三星笔记 120Hz自适应屏幕 5G手机游戏手机 12GB+256GB 初露白',
              goodsAttr: [
                {
                  attrName: '选择颜色',
                  attrValue: '亮黑色'
                },
                {
                  attrName: '运行内存',
                  attrValue: '8GB'
                },
                {
                  attrName: '机身存储',
                  attrValue: '512GB'
                }
              ]
            }
          ]
        },
        {
          id: '12987123',
          name: '里某某',
          total_payment: 100.0,
          phone: '18523652182',
          address: '海南省 三沙市 中沙群岛 中沙群岛 第一座岛屿',
          create_time: '2020-04-11',
          status: 2,
          list: [
            {
              price: 100.0,
              num: 1,
              img: 'https://img.alicdn.com/imgextra/i2/2502349528/O1CN010GNAOc2KFsLn58vTM_!!2502349528.png',
              title: '2020新款复古小个子温柔风衣中款150cm外套显高显瘦学生中长款秋',
              goodsAttr: [
                {
                  attrName: '尺码',
                  attrValue: 'S'
                },
                {
                  attrName: '颜色',
                  attrValue: '米色'
                }
              ]
            }
          ]
        }
      ],
      total: 0,
      currentPage: 1, //初始页
      pagesize: 10 //每页的数据
    }
  },
  mounted() {
    this.getNewTableData()
    this.getOrderNumber()
  },

  methods: {
    // 初始页currentPage
    handleCurrentChange: function(currentPage) {
      this.currentPage = currentPage
    },
    //表格内容居中显示
    isCenter({ row, column, rowIndex, columnIndex }) {
      return 'text-align:center'
    },
    // 获取相同编号的数组
    getOrderNumber() {
      let OrderObj = {}
      this.tableNewData.forEach((element, index) => {
        element.rowIndex = index
        if (OrderObj[element.id]) {
          OrderObj[element.id].push(index)
        } else {
          OrderObj[element.id] = []
          OrderObj[element.id].push(index)
        }
      })
      // 将数组长度大于1的值 存储到this.OrderIndexArr（也就是需要合并的项）
      for (let k in OrderObj) {
        if (OrderObj[k].length > 1) {
          this.OrderIndexArr.push(OrderObj[k])
        }
      }
      console.log(this.OrderIndexArr, 'OrderIndexArr')
    },
    // 合并单元格
    objectSpanMethod({ row, column, rowIndex, columnIndex }) {
      if (columnIndex === 0 || columnIndex === 4 || columnIndex === 5 || columnIndex === 6 || columnIndex === 7 || columnIndex === 8 || columnIndex === 9 || columnIndex === 10) {
        for (let i = 0; i < this.OrderIndexArr.length; i++) {
          let element = this.OrderIndexArr[i]
          for (let j = 0; j < element.length; j++) {
            let item = element[j]
            if (rowIndex == item) {
              if (j == 0) {
                return {
                  rowspan: element.length,
                  colspan: 1
                }
              } else if (j != 0) {
                return {
                  rowspan: 0,
                  colspan: 0
                }
              }
            }
          }
        }
      }
    },
    tableRowClassName({ row, rowIndex }) {
      let arr = this.hoverOrderArr
      for (let i = 0; i < arr.length; i++) {
        if (rowIndex == arr[i]) {
          return 'hovered-row'
        }
      }
    },
    getNewTableData() {
      this.tableData.map((res) => {
        res.list.map((item) => {
          item.id = res.id
          item.total_payment = res.total_payment
          item.create_time = res.create_time
          item.status = res.status
          item.name = res.name
          item.phone = res.phone
          item.address = res.address
        })
        this.tableNewData.push(res.list)
      })
      this.tableNewData = this.tableNewData.flat()
    }
  },
  created() {}
}
</script>
<style lang="scss" scoped>
.merchantOrderManage {
  background: #fff;
  width: 100%;
  left: 40px;
  right: 40px;
  padding: 20px;
  margin: 0 auto;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  .info_box {
    display: flex;
    align-items: center;
    margin: 0 10px;
    .info_box_img {
      cursor: pointer;
      width: 50px;
      flex: 0 0 50px;
      margin-right: 6px;
      img {
        width: 50px;
        height: 50px;
      }
    }
    .info_describe {
      .text {
        margin-bottom: 6px;
      }
      .attr {
        color: #9e9e9e;
        span {
          margin-right: 6px;
        }
      }
    }
  }
}

.el-tag {
  width: 100%;
  height: 36px;
  line-height: 36px;
}
.tip-tag {
  .el-tag {
    text-align: center;
  }
}
</style>