According to the development of inertial instrument test platform, this paper presents the necessity of designing inertial instrument automatic test platform. It also introduces the design ideas of the totality of the design of hardware and software of the platform. The test platform has some good advantages such as real time, stability, credibility and being used widely. At the same time, it also provides friendly human-computer interface. This platform makes the whole test process operation convenient, reduces the artificial test error and realizes the automatic operation.