I set overflow-x: scroll for the outermost div. When you want the span inside to exceed, scroll horizontally and find that the effect is still scrolling up and down. How to layout 
 html 
<div class="shopCouponBor">
            <span class="shopCouponString">99940</span>
            <span class="shopCouponString">99940</span>
            <span class="shopCouponString">99940</span>
            <span class="shopCouponString">99940</span>
            <span class="shopCouponString">99940</span>
            <span class="shopCouponString">99940</span>
            <span class="shopCouponString">99940</span>
</div>
css
.shopCouponBor {
  width: 450px;
  height: 30px;
  float: right;
  overflow-x: scroll;
/*  overflow-x:auto;
  overflow-y:hidden;*/
}
.shopCouponString {
  height: 28px;
  line-height: 28px;
  font-size: 17px;
  color: -sharpFF9F9F;
  border: 1px solid -sharpFF9F9F;
  background: -sharpFFF1F1;
  padding: 0 10px;
  border-radius: 3px;
  margin-right: 15px;
}
  
