使用多个卡片显示的时候，并且要求当列数到一定数目的时候，要自动换行，el-container 布局就满足了需求了，就要用到el-row 布局做分栏处理，

代码如下

<template>
  <el-row :gutter="20"  class="el-row" type="flex" >
    <el-col :span="8" v-for = "(item,index) in apps" :key="item.id" class="el-col" >
      <el-card class="el-card"  :key="index"  onclick="">
        <div slot="header" class="clearfix">
          <span>{{item.appname}}</span>
        </div>
        <div >
          <div class="text item">
            <div class="item_tag" >
              <span >用户标签：</span>
            </div>
            <div class="item_desr">
              <span > {{item.tag}}</span>
            </div>
          </div>
          <div class="text item">
            <div class="item_tag">
              <span>搜索标签：</span>
            </div>
            <div class="item_desr">
              {{item.seatag}}
            </div>
          </div>
          <div class="text item">
            <div class="item_tag">
              <span>短信签名：</span>
            </div>
            <div class="item_desr">
              <span>
                 {{item.wxname}}
              </span>
            </div>
          </div>
          <div class="text item">
            <div class="item_tag">
              <span>客服QQ：</span>
            </div>
            <div class="item_desr">
              {{item.qq}}
            </div>
          </div>
          <div class="text item">
            <div class="item_tag">
              <span>商务合作：</span>
            </div>
            <div class="item_desr">
              {{item.buscoo}}
            </div>
          </div>
        </div>
      </el-card>
    </el-col>
    <el-col :span="8">
      <el-card class="box-card" style="min-height: 200px;" align="middle" onclick="">
        <div class="el-card__body mid">
          <el-button  icon="el-icon-circle-plus" circle></el-button>
          <el-button style="margin-left: 0;color: #505458" type="text">添加APP</el-button>
        </div>
      </el-card>
    </el-col>
  </el-row>
</template>
<script>

css

<style type="text/css">
  .all{
    margin-top: -30px;
    word-break: break-all;
    height: 100%;
  }
  .mid{
    margin-top: 25%;
    height: 50%;
  }
  .mid_item{
    justify-content: center;
    align-items: center;
  }
  .item {
    margin-bottom: 10px;
  }
  .item_tag{
    float:left;
    text-align:left;
  }
  .item_desr{
    margin-left: 40%;
    min-height: 30px;
    text-align:left;
  }
  .text {
    width: 100%;
    font-size: 12px;
    font-family: "Microsoft YaHei";
    color: #909399;
  }
  .clearfix:before,
  .clearfix:after {
    display: table;
    content: "";
  }
  .clearfix:after {
    clear: both
  }

  .el-card {
    min-width: 100%;
    height: 100%;
    margin-right: 20px;
    /*transition: all .5s;*/
  }
  .el-card:hover{
    margin-top: -5px;
  }
  .el-row {
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap
  }
  .el-col {
    border-radius: 4px;
    align-items: stretch;
    margin-bottom: 40px;
  }
</style>