The hydraulic system's key features and design principles of dock pedestrian pedal were introduced,and plans for hydraulic system and control system were presented based on analysis of the hydraulic cylinders' positive and negative load conditions during exercise.The hydraulic system's parameters determining,selection and calculation of hydraulic components,security measures were explained from the design requirements and technical parameters.Debugging and testing were done.Production practice proves that the speed,back pressure and operation are stable in hydraulic drive system,and its performance meets the design requirements.