Abstract: In view of the problems in the actual transaction business of china railway procurement platform, such as the poor invoice flow, the difficulty in checking invoice orders and the mismatch of financial entry information, this paper put forward a design scheme of using the new version of tax control server to build an electronic invoice service system. Through the key technologies such as invoice coding, metadata generation and bill generation, the paper effectively implemented the objectives of improving invoice circulation, simplifying manual processing, and improving the efficiency of financial reconciliation and entry. This scheme will help railway enterprises to reduce costs and increase efficiency and save social resources.