According to the working principle,technical standards and experimental requirements for a certain type of aircraft landing gear retractable hydraulic solenoid valve,an intelligent detection device was designed.The intelligent detection device core was computer control,and it integrated electrohydraulic technology with electromechanical technology.It could be used to test the external sealing performance,internal leakage performance and working performance of the solenoid valve in an integrated way.Practical application shows that:the device runs stably and reliably,operates simply,has high detection efficiency and accuracy,and has good use effect and economic value.