In order to allocate the bandwidth more efficiently and simply, this paper analyzes the limitation of the DRR ( Deficit Round Robin) algorithm in the packet switch, and proposes an algorithm based on deducting credit and interleaving the output packets. 为了简单有效地分配链路带宽,该文分析了DRR(DeficitRoundRobin)算法在数据交换实现上的局限性,提出了一种基于令牌扣除并平滑输出突发性的调度算法。