引入了一种新的ＡＴＭ交换结构，该交换结构采用共享输入缓冲区的方法提高缓冲区利用率，减少信元丢失，采用扩展输入端口策略提高系统吞吐率，减少交换延时．仿真性能分析表明该结构可以有效地达到上述要求．同时，合适的缓冲区控制策略使该交换结构可以保持信元次序．具体实现了该交换，并给出了均匀业务、突发业务下的性能仿真结果． A new ATM switching fabric is introduced, which uses a shared input buffer to improve buffer utilization and reduce cell loss. The extended input port strategy is adopted to increase system throughput and reduce switching delay. Simulation performance analysis shows that the structure can effectively meet the above requirements. At the same time, the appropriate buffer control strategy allows the switch fabric to maintain cell order. The concrete realization of the exchange, and gives the performance of uniform business, sudden business simulation results.