In order to reduce the flow resistance and power consumption of the system when the multiple directional control valve worked, numerical simulation study for the inside flow channel shape of multiple directional control valve was carried out by using FLUENT. The threedimensional simulation of the internal flow field was carried out, and the flow passage was optimized by changing the parameters of the section shape.The simulation results show that the improved flow channel structure optimizes the flow path area, which effectively reduces the oil flow resistance and has good oil breakthrough capability. The research provides reference for improving efficiency and reducing energy consumption of multiple direction reversing valve.