In order to distribute the traffic in reason for MPLS networks, this paper proposes a new kind of strategy and algorithm based on the type length value in constraint route-label distribution protocol for implementing traffic engineering. 为了在MPLS网络中使流量分布趋于合理,提出了一种基于CR-LDP(限制路由标记分配协议)中TLV(类型长度值)的流量工程实现策略及算法。