/deep/ .el-transfer-panel {
    width: 45%;
    &__body,
    &__list {
      height: 500px;
    }
  }
/deep/ .el-transfer-panel__body {
    height: 500px;
}  
/deep/ .el-transfer-panel__list {
    height: 500px;
} 
/deep/ .el-tree {
  padding-right: 0px; 
}