Abstract: The maintenance plans beyond schedules are necessary to keep the normal operation of the railway. The paper operation has some shortcomings, such as that the information of maintenance is not perfect, the information of transfer is simple, hierarchical management data is not clear, and so on. These problems are not conductive to statistical analysis and management. Aiming at the problem of maintenance plans beyond schedules, combining with the actual operation process, this article designed and developed a Management Information System for maintenance plans beyond schedules which was supported by the database and network technology, based on C/S model. The System was designed with three-level application, which is work area, headquarters of a team, the company. It implemented the functions of the maintenance plan of submission, modify, approval, order execution, feedback, data query, and etc., improved the quality of management. This System was applied in the Tianjin South Circle Railway Company. The application effect was good.