The oil flow rate in the hydraulic valve is too high, which can make the oil temperature rising too fast and can produce noise. In order to reduce the oil flow rate in multiple directional control valve, the valve interior flow field of three dimensional (3D) model is established. The general Computational Fluid Dynamics (CFD) software Fluent was adopted to analyze valve flow channel section, and the 3D numerical simulation was carried out. By changing the local and the overall shape of the structure of the flow channel, the velocity of flow field state was gotten at the moment. The research work provides a basis for system modeling analysis and to improve the valve performance.