提出了一种新型的基于波分复用（ＷＤＭ）技术的ＡＴＭ光交换模型，即广播选台的改进模型，有效地克服了广播选台式光交换固有的内部阻塞，提高了系统性能。缓存采用共享光纤环输入缓存方式，有效地节省了大量的光纤环，减小了交换机的体积。通过时该系统的性能分析，得到了较为理想的结果。 A new model of optical switching based on wavelength division multiplexing (WDM) is proposed, that is, an improved model of broadcast channel selection, which can effectively overcome the inherent internal blocking of broadcast-based optical switching and improve the system performance. Cache shared optical fiber ring input buffer, effectively saving a lot of fiber ring, reducing the size of the switch. Through the performance analysis of the system, the ideal result is obtained.