<div class="orgAssign">

<div class="aa"></div> //aa固定高度的

<div class="org-list-content">

</div>

</div>

.orgAssign {

  display: flex;

  flex-direction: column;

  width: 100%;

  height: 100%;

  background: #f5f8fb;

.aa{

height:100px;

}
 

  .org-list-content {

    flex: 1;

    overflow-y: auto;

  }

}

父级display: flex;flex-direction: column; 实现org-list-content区域滚动