Abstract: This paper designed a unified operation and maintenance application system of railway freight fundamental dictionary based on microservice architecture to the problem of confusion in the operation and maintenance of freight fundamental dictionary.By using the technologies of spring boot, Vue, authorization code authentication, circuit breaker, etc., and combining with micro service architecture, it was implemented the function of unified operation and maintenance of railway freight basic dictionary. This system has been used by many freight related systems. The application results show that the data errors of production, bill, statistics and so on caused by the conflict of dictionaries have been significantly reduced, and the workload of personnel has been reduced. Microservice architecture can effectively reduce the difficulty of design, development and maintenance, and enhance the efficiency of development.