The flow channel pressure loss is directly determined by the geometric construction of multidirectional valve in high power tractor electrohydraulic hitch. Large pressure loss will seriously affect the entire multidirectional valve hydraulic output power，thus the overall dynamic performance of the electrohydraulic hitch in tractor is restricted. In order to improve machining efficiency and reduce local pressure loss, a new internal flow channel of multidirectional valve was designed by combining machining and casting method.Based on the theoretical analysis of the pressure loss in the flow channel of the multidirectional valve, the threedimensional numerical simulation and analysis on the flow state and pressure loss of the oil in the different flow channel of the multidirectional valve were carried out by using ANSYS finite element flow field analysis module. The simulation results show that the pressure loss of the multidirectional valve meets the design requirements and can be used in the electrohydraulic hitch of the high power tractor.