方法1 

<Link className="item" to={{pathname:'/order',params:{index :"3"}}}>
　　<i className="icon iconfont icon-shangpingouwudai2"></i>
　　<p>售后</p>
</Link>

方法2

<div className="item" onClick={this.go_order.bind(this,index)}>
　　<i className="icon iconfont icon-shangpingouwudai2"></i>
　　<p>测试</p>
</div>

go_order(index){
　　this.props.history.push({pathname:"/order",params:{index :index}});
}