SOURCE

<div class="flex-container1">
  <div class="button">
    <div class="button1">
      删除
    </div>
    <div class="button_blank">
    </div>
    <div class="button1">
      编辑
    </div>
  </div>
</div>

.flex-container {
  display: flex;
  height:120px;
  border: 1px solid blue;
}

.button {
  display: flex;
  /* margin-top:80px; */
  border: 1px solid red;
  flex: 1;
  height: 90px;
  margin: 0px 30px 0 30px;
}

.button1 {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid blue;
}

.button_blank {
  width: 30px;
  border: 1px solid darkblue;
}