In order to solve the problems of low work efficiency, error-prone, poor data traceability and inconsistent polarity in the traditional aerospace engine assembly polarity test, an intelligent positioning polarity tester system was designed. The system adopts key technologies such as Hall sensor to collect the electric field of solenoid valve, micro pressure sensor to collect nozzle outlet pressure, sampling resistance to collect loop current, etc., and realizes data consistency interpretation through the intelligent positioning polarity test software of the space engine, so as to ensure the correct polarity of the engine installation, improve the test performance, reduce maintenance costs, optimize the design and promote the development of technology, and provide a strong guarantee for the high-frequency emission of the spacecraft.