Aiming at the problems such as the difficulty in locating accidental faults and the inadequacy of system diagnosis capability in fault diagnosis and equipment maintenance of airborne weapon control system, an integrated diagnosis platform of weapon control system built on the basis of open system architecture and commercial off-the-shelf component is proposed.The platform, oriented to muptiple types of aircraft, meets the II-level repair system and is able to provide the comprehensive support in the full life cycle of equipment from design, operation to maintenance, which lays a solid foundation for solving the contradiction between equipment complexity and diagnosis/maintenance, maximizing the diagnosis efficiency, reducing the maintenance cost and ensuring the readiness of weapon control system.