The existing flow valve basically uses the mechanical pressure compensator or the flow sensor to compensate the pressure difference, which scheme can lead to the increase of system complexity, the loss of energy and the low precision of flow control, and other problems. Aiming at the above problems, digital differential pressure compensation scheme is proposed to control the flow accurately. The mathematical model of Valvistor valve was established, which could obtain the approximate linear relationship of output flow, pilot control voltage and square root of pressure difference through analysis. Therefore, flow compensation controller based on bilinear interpolation as operational principle was designed. And the simulation model of proportional flow valve was established based on bilinear interpolation principle. The simulation results show that the valve has a high precision of static control and good equal flow characteristics, meanwhile, the valve has high flow compensation accuracy when the load is disturbed, and has fast dynamic response.