With the rapid development of technologies such as cloud computing and the Internet of Things, in order to meet the requirements of flatness and robustness, the urban rail transit AFC system needs to adjust the traditional architecture in combination with traditional businesses and new businesses such as multiple payment methods. The cloud platform AFC system came into being. It has the advantages of distributed storage, high availability, intelligent operation and maintenance, and low coupling, which can make up for the defects of traditional AFC architecture and single architecture. Based on the analysis of traditional AFC system business, new Internet payment requirements, monolithic architecture and micro-service architecture comparison, this article considers the use of the micro-service architecture-based cloud platform AFC system, builds a micro-service architecture according to business needs, and modularizes the business The form is presented, and the key technologies under the micro-service architecture are considered. Finally, the compatibility of the micro-service architecture and the existing system is considered to provide references for the application and innovation of micro-services in the AFC system.