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In this paper we first reviewed the application of information technology system in Urban Rail Transit secondly we overviewed the efforts had been done and discussed the key points will be done in the future on information technology field of Beijing subway Then described the being built systems that multi-disciplinary and cross-platform such as "Integrated Management Information Platform in Beijing metro and National key research and development project "safety guarantee technology of urban rail system program.Finally this paper summarized the basic framework of urban rail transit information construction we hope it will help the research on intelligent transport of city rail transit.