Compared with the load sensing system,the pump-valve coordination pressure and flow control system is adopted to achieve more accurate flow control and less system pressure loss.However,since the pressure sensor is used to detect the differential pressure before and after the valve port and adjust the valve port opening in real time to achieve accurate flow regulation,high-frequency fluctuation of valve port pressure will cause spool oscillation,resulting in pressure shock and flow instability.In view of this situation,a differential pressure-displacement detection device was proposed to improve the damping ratio of the system,which could suppress the spool oscillation when the pressure fluctuated at high frequency to improve the stability of the system.The control system model of the electronic pressure compensation was established and verified by AMESim.The control system simulation model with the differential pressure-displacement detection device was established,and the influence of the device on the system characteristics was studied through simulation.The results show that the effects of spring stiffness,viscous damping coefficient and piston mass on system characteristics decrease successively.When the load frequency is less than 50 Hz,the stability and accuracy of the flow can be ensured without the differential pressure-displacement detection device.When the load frequency is between 50 Hz and 80 Hz,the output flow fluctuation is reduced by 15% to 30% by using the differential pressure-displacement detection device,the oscillation of the main spool is reduced by about 85%.