Abstract: This paper introduced the design of micro-service architecture for Wi-Fi operation service platform of railway station and train, analyzed the shortcomings of the background architecture of the original monomer application mode, and put forward the design of the micro-service architecture based on Spring Cloud, combined with the original background application architecture and business characteristics, proposed the transformation scheme. After micro service transformation, the code reuse rate of Wi-Fi operation service platform of railway station and train is higher, and it can meet the changing business needs more quickly. The introduction of centralized log acquisition and retrieval architecture and micro-service link tracking support make the application monitoring and debugging of the platform more convenient, improve the efficiency of research and development of new functions, and provide strong support for system debugging and maintenance.