Foreign launch vehicles generally use the containment release launch technology to realize the force control at the take-off time of the rocket,so as to improve the launch safety and reliability.The reliability of containment and the response speed of release determine the success or failure of rocket launch.Aiming at the case of hydraulic drive connecting rod type restraint and release device,the mechanism parametric model was deeply studied and constructed,the design of hydraulic drive system was completed,the joint simulation based on ADAMS and AMESim was carried out,the release related characteristics of the device was systematically studied,and the release characteristic curves were obtained.It has certain reference value for the design of launch vehicle restraint and release device.