Abstract: According to the needs of railway passenger and freight transport electronic payment business, based on the analysis of existing railway payment business characteristics, this article discussed the significance of constructing the unified electronic payment platform and the design principles of the electronic payment platform, studied and designed the logical structure and physical structure of electronic payment platform, described the function structure of the system in detail. The research and construction of the electronic payment platform, which implemented the diversification of railway transportation service payment method, was the major innovation of the railway investment and financing reform management mode.