Abstract: In order to solve the problems of large amount of BIM and GIS data, complex data services and large concurrent visits in the multiple sites, multiple intervals and multiple lines management of rail transit BIM + GIS cloud platform, this article analyzed the defects of single service architecture and the advantages of micro service architecture. Based on the formulation of microservice splitting mode and design principles, the microservice architecture design of rail transit BIM + GIS cloud platform was implemented. The architecture was applied in the construction of subsea shield tunnel in Huosuo section of Dalian Metro Line 5. The application results show that the platform performance, carrying capacity and user experience are improved by using SpringBoot / Cloud microservice architecture.