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In response to the urgent demand for software reconfiguration and upgrade in orbit brought about by the extended spacecraft life and increased functional complexity, a network for unified management of on-board software upgrade and reconfiguration is designed based on SpaceWire, and a universal software maintenance controller is designed and implemented; the on-board software reconfiguration network connects mass storage modules and on-board computers, payload processors and other end devices that need software reconfiguration through SpaceWire routers. The mass storage is used as a shared pool of storage resources to receive reconfiguration and upgrade software programs from various types of on-board devices and can directly distribute the software programs to the corresponding devices via SpaceWire. The software maintenance controller is located inside the terminal device, which encapsulates the software reconfiguration data in a unified format, supports the fragmentation update of software upgrade data, software error correcting code (ECC) storage, software application (APP) switching control and other functions, solves the dilemma of lacking unified operation process, lacking common communication protocol and lacking high reliable design support for on-board software upgrade, and the controller is designed with radiation-hardened Application Specific Integrated Circuit (ASIC). It meets the requirements of the space environment and lays the foundation for the flexible and convenient on-orbit reconfiguration of the on-board software.