Crossbar网络是实现高速并行光学处理的一种最重要而有效的光交换网络结构。作为一种无阻塞网络,Crossbar网络具有简单性,易于实现控制,适合于构成光开关矩阵。总结和分析了近20多年来发展的Crossbar光交换网络,介绍了不同Crossbar光交换网络的原理、结构和性能,分析了Crossbar光交换网络的关键技术。目前光学互连网络的发展方向是实现集成大规模光互连。可以预见光学互连网络会朝着更加实用化的方向发展,并在其应用领域发挥越来越重要的作用。 The Crossbar network is one of the most important and effective optical switching network architectures for high speed parallel optical processing. As a non-blocking network, Crossbar network is simple and easy to control, suitable for forming optical switch matrix. This paper summarizes and analyzes the Crossbar optical switching network developed over the past 20 years, introduces the principle, structure and performance of different Crossbar optical switching networks, and analyzes the key technologies of Crossbar optical switching networks. At present, the development direction of optical interconnection network is to realize integrated large-scale optical interconnection. It is foreseeable that the optical interconnection network will move toward a more practical direction and play an increasingly important role in its applications.