Abstract: This paper conducted research and analysis on the construction of power supply systems in various railway group companies in China. Through centralized deployment, microservices, multi-source heterogeneous data collection, and big data visual decision-making technologies, the paper designed a railway power supply management information system based on power supply equipment asset data and with safety production as the main line, implemented functions such as power supply equipment asset management, data collection and sharing, unified production organization, and auxiliary decision support. The system has been applied to CHINA RAILWAY, various railway group companies and their power supply/maintenance sections, workshops, work areas/teams, and other departments. It provides support for further improving the level of information management in railway power supply systems.