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In recent years, with the rapid development of the high-speed railway, the safety and efficient operations are increasingly higher requirements. Railway accidents are caused by many factors, such as human factors, technical factors, natural factors, and sometimes are the result of several factors working together. This paper aims to build a scalable CTCS-3 simulation platform in the open environment for fault analysis and safety verification, using JMS and RMI heterogeneous interconnect middleware. Finally, given in the mudslides, rain, snow, and other natural environmental factors, with the application of Wulongquandong Station-Xianningbei Station actual line data, we simulate three trains. The results indicate that the platform can easily extend and obtain the safe operation of trains. IntroductionDistributed simulation technology [1] because of its similarity with the actual structure of the system as well as the simulation fidelity and reliability has been widely used in practical engineering. For the analysis of parallel discrete event systems (PDES), distributed simulation has more irreplaceable advantages. CTCS-3 [2] is a typical parallel discrete event system. Distributed simulation during the design should ensure that all distributed information exchange between computers in real-time and with high accuracy. Middleware technology [3,4] can play a shielding effect of different pervasive computing devices and provide a unified interface specification for different applications.