In order to compensate the pressure loss of hydraulic system with transmission device and improve the stability of transmission device,an intelligent compensation system is designed to improve the pressure loss of hydraulic system.The structure and working principle of the transmission device are described,and the FLuidSIM software is used for simulation analysis.An intelligent pressure compensation system with proportional feedback link is designed by using proportional directional valve and sensor.The simulation models of general belt transmission hydraulic system and intelligent compensation belt transmission hydraulic system are established by AMESim.The simulation results show that the intelligent compensation system can effectively compensate the pressure loss of the system with transmission device under the same working pressure,and maintain the stable supply of pressure required by the transmission device.