Abstract: Aiming at the visualization problem of railway network space security protection, this paper studied the theoretical basis of railway network visualization, and analyzed the actual structure of railway network from theoretical research and technical path respectively. On this basis, the paper further analyzed the application of railway network spatial visualization, and given an application example. The analysis shows that the proposed path can implement the monitoring, early warning and disposal of railway network security events, and has reference significance in network performance evaluation and risk prediction.