In order to study the influence of micro morphology on the radial shaft seal wear,a multiscale simulation method including micro factors was proposed.This method not only involves macrofactors such as contact pressure and contour changes,but also reflects microcharacteristics such as roughness,microspiral groove,etc.A related simulation process was established to simulate the wear of the radial shaft seal under mixed lubrication conditions,and the influence of the number of microspiral grooves on the shaft surface,the surface roughness of the seal lip and the temperature on the wear of the radial shaft seal was analyzed.The results show that the micromorphology in the sealing area has a nonnegligible effect on the wear rate and the sealing performance of the radial shaft seal.By reducing the number of microspiral grooves on the shaft surface and the surface roughness of the seal lip,the wear of the radial shaft seal can be effectively reduced.Increasing the surface roughness of the lip or making the oil temperature above 80 ℃ can directly increase the pumping rate by affecting the distribution of fluid dynamic pressure in the sealing area.