CFD method was used to analyze flow resistance and pressure pulsation characteristics of four common centrifugal shaft inlet structures, such as the axial end oil inlet, single hole radial oil inlet, double holes radial oil inlet and four holes radial oil inlet. The research results show that with the increase of rotating speed of the centrifugal shaft, the total pressure loss of the axial end oil inlet structure decreases and the pressure pulsation is insignificant, while the total pressure loss and pressure pulsation amplitude of the radial oil inlet structure increase with the increase of rotating speed, but with the increase of the number of radial oil inlet holes, the total pressure loss and pressure pulsation amplitude decrease. From the perspective of flow resistance and pressure pulsation characteristics, the axil end oil inlet structure has more advantages and it is recommended in the clutch lubrication design