The impact and vibration issues caused by strong time-varying and non-linear characteristics during the rapidly falling operation of large-tonnage hydraulic forming equipment,will seriously affect the forming quality of the process.According to the problems in the existing rapidly falling control technology,the dynamic characteristics of the hydraulic system were analyzed,and the design method of rapidly falling motion law based on the quintic curve was proposed.Constrained with the maximum average velocity and the minimum impact,NSGA-II algorithm was used to solve the optimal motion curve and develop a control strategy of motion curve tracking based on fuzzy PID.The effectiveness of design and control of the motion curve for the rapidly falling were validated by simulation and experiments.The results show that the impact during moving cross member movement is effectively reduced by 21%.