Abstract: The traditional collaborative office system is mostly based on single architecture, which has poor reusability, maintainability and scalability. Based on the micro service architecture technology, the actual situation and characteristics of railway enterprises, this paper analyzed the model of office business field, divided the complex business into small micro service units, and constructed the railway enterprise collaborative office system, so as to reduce the coupling degree, improve the fault tolerance and enhance the ability of rapid response. The key technologies of the system have been verified.