<scroll-view class="box" scroll-x="true" >

    <view class="box-item" >1</view>

    <view class="box-item" >2</view>

    <view class="box-item" >3</view>

</scroll-view>

.box {

    width:100%;

    hight: 200rpx;

    /*white-space 不能丢  */

    white-space: nowrap;

    border: 1px solid red;

    box-sizing: border-box

}

.box-item {

    width: 45%;

    hight:100%;

    border:2rpx solid green;

    box-sizing: border-box;

    display: inline-block

}