General spacecraft ground test bed system

The present invention provides a general spacecraft ground test bed system. The system comprises a test bed structure; a test bed simulation device configured to realize the general simulation of electric interfaces, electrical property equivalence of a dynamo-electric device, onboard flight environment simulation and the electrical interface simulation of an external system; a preposition test device; and a general control device located at a testing hall. The test bed structure employs freely splitting and combining open-type framework rack, and the open-type framework rack employs a bearing rod, an installing plate and a bearing rod joint. The test bed simulation device comprises a 1553B bus simulator, a power supply and distribution simulator, an Ethernet communication simulator and a simulation service and controller. The general spacecraft ground test bed system is able to develop a system-grade test prior to the completion of single unit equipment so as to conveniently and effectively discover abnormal