In order to reduce satellite attitude conversion and repeated establishment of test state, and improve the efficiency of satellite space mechanism deployment test, an efficient deployment test method of satellite multi-mechanism integration was proposed. By adopting the new mode of satellite-borne gravity unloading and the multi-mechanism integrated deployment method, the satellite-device integrated deployment test design, multi-mechanism space mechanics coupling analysis, kinematics and dynamics analysis, the impact of deployment locking and the accuracy analysis of deployment profile are carried out, and the multi-mechanism integrated ground deployment test verification is completed. The results show that, compared with the traditional test method, this method can simulate the deployment sequence and deployment state of the satellite in orbit more realistically; the consistency of the repeated deployment test data of the mechanism is better, and the deployment test efficiency is higher; it can be widely applied to the efficient and high-quality development of the batch production satellite.