Aiming at the problems of service security, load balancing and scalability faced by the land archives system designed by traditional SOA architecture, a distributed archival system based on microservice architecture is designed and implemented. According to the idea of micro-service architecture, the function of archives system is divided into fine-grained micro-service components, and the Authentication Service module between microservices is designed to realize the secure access control of microservices, and the soft load problem of the system is solved by service registry, service Gateway and SpringCloud system framework. The Docker microservice cluster is used to complete the independent deployment run and business function scaling of the microservice components. The inverted index of file data file is established, which improves the speed and accuracy of file data query.