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In order to realize the automatic test and control of the landing deceleration parachute lock life test for the aircraft,According to the structural characteristics and test requirements,an electro-hydraulic servo loading device is designed to simulate the opening loads of the landing deceleration parachute,The lock is automatically locked by the specially-designed actuator. By applying image visual technology based on OTSU global threshold selection arithmetic,a non-contact detection is carried out for the locking status of the lock,and with the checking result serving as driving signal,an auto circle control of “preloading-locking-loading-offloading-unlocking” is realized. The system is proved to be stable and reliable by batches of testing applications,which significantly improves the operation efficiency and QC level of the long period life test item.