Based on the principle of the hydraulic pile driver, in order to make the strike point in the preset range, the striken clamping boxes and trolley structure were added and a new type of top-pull hydraulic power pile drive was designed. To meet the environmental requirements, the noise was reduced by adding fixed soundproof layer. The model of hydraulic-load system and the corresponding component sub-modules were established and simulated by applying the software AMEsim. The result shows that the main parameters of the system were comply with the design requirements, such as the biggest striking energy, frequency and impact hammer undershoot acceleration. By changing the rod spring stiffness parameters, the influence of the impact system is analyzed, which provide a guiding significance for the researching and developing of hydraulic dynamic pile-driver.