The high-speed railway has been developed rapidly, and the topological structure and transportation organization of the railway network have changed greatly. In this paper, China's high-speed railway is taken as the research object and train flow network is established. Indexes are calculated from the perspective of the network and transportation organization. The comprehensive evaluation index is determined with TOPSIS method to identify key indicators of the station. The example identifies not only the provincial capital stations, but also the stations with small scale but critical position affecting the whole network transportation service capacity. The research of high-speed railway network property contributes to forming the transport organization strategy, which makes the network service feature more robust and helps for the optimization of railway network infrastructure.
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