最后的实现效果如下：

HTML代码如下：:colspan="alarms_models.length + 1"意思是规定单元格可横跨的列数，此处我动态设置为报警设备alarms_models+1，也可以写成colspan="10"

<table class="list-table">
    <thead>
      <tr class="table-title">
        <th class="tac"
            :colspan="alarms_models.length + 1">终端报警数量</th>
      </tr>
      <tr class="table-title">
        <th class="tac">类型</th>
        <th class="tac"
            v-for="(item,i) in models"
            :key="i">{{item}}</th>
      </tr>
    </thead>
    <tbody>
      <tr class="table-content">
        <td>安装数量</td>
        <td v-for="(item,i) in models_all"
            :key="i">{{item}}</td>
      </tr>
      <tr class="table-content">
        <td>当前离线</td>
        <td v-for="(item,i)  in models_offline"
            :key="i">{{item}}</td>
      </tr>
      <tr class="table-content">
        <td>数据异常</td>
        <td v-for="(item,i)  in models_datafault"
            :key="i">{{item}}</td>
      </tr>
    </tbody>
  </table>

数据：模拟的假数据

export default {
  data () {
    return {
      // 报警统计
      alarms_camera: [0, 0, 0, 0, 0, 0, 0, 0, 0],
      alarms_hfct: [0, 0, 0, 0, 0, 0, 0, 0, 0],
      alarms_ir: [0, 0, 0, 5, 0, 0, 0, 0, 0],
      alarms_models: ['T3000', 'SU10', 'T2000', 'M1000', 'SH10', 'ST10', 'D10', 'SA10', 'SU20'],
      alarms_sound: [0, 0, 0, 0, 0, 0, 0, 0, 0],
      alarms_uhf: [0, 0, 0, 0, 0, 0, 0, 0, 0]

    }
  }
}

CSS样式：

.list-table {
  width: 100%;
  margin: 10px 0;
  .table-title {
    border: none;
    color: #7fddf6;
    font-size: 17px;
    background-color: #126791;
    .tac {
      position: relative;
      padding: 9px 15px;
      height: 20px;
      line-height: 20px;
      font-weight: normal;
    }
  }
  .table-content {
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    td {
      text-align: center;
      border: none;
      color: #bec3cb;
      padding: 10px 10px;
      height: 20px;
      line-height: 20px;
      font-size: 14px;
    }
  }
}