Abstract: The rocking simulator with multiple degrees of freedom is a common high-precision simulation platform for simulating motion attitude, which is widely used in ship, aviation, automobile and amusement industry. Based on specific performance requirements, this paper designs the hydraulic system of the rocking simulator, including verifying the motion law of the cylinder, determining the key parameters, main components, control system and control strategy. The theory mentioned in this paper has been applied to a large amusement equipment that simulates the rocking posture, which provides a feasible reference method for the design of such a system, and can also be used as the theoretical verification of the simulation results.