The hydraulic vibration head is the core component of Sonic drilling rig, and the performance of its hydraulic system influences the technology of sound drilling directly. The structure and hydraulic system of the hydraulic vibration head are designed, and the AMESim model of the hydraulic system is established. The hydraulic vibration system was simulated and analyzed to find out the influence rule of vibration frequency on the system performance. The results show that the larger the vibration frequency f is, the smaller the amplitude H is, and the displacement response of the vibrating piston approximates the sine curve.The velocity and acceleration of the vibrating piston are accordingly increased, and the exciting force F of the vibrating piston is increased significantly.