In order to explore the effects of microsurface on the cavitation occurrence in the liquid film seals,based on the JFO cavitation model and coordinate transformation,the mathematical model of spiral groove liquid film seals with double dams considering the surface topography was established,and the governing equation was discretized by finite volume method.The effects of surface roughness,circumferential waviness and radial taper on the cavitation occurrence of spiral groove liquid film seals were analyzed.Results indicate that,by comparison,the locations of cavitation area in the liquid film are dispersed and the cavitation shapes are irregular after considering the micro-surface topography.By the cavitation area rate as the criterion,the lager surface roughness has a positive role in promoting cavitation occurrence,but the effects can be ignored because of the small data.The effects of radial taper on the induction and inhibition of cavitation are limited,while the increase of waviness amplitude prominently promotes the cavitation occurrence.At higher frequency waviness number,positive taper is helpful to reduce the ratio of liquid membrane cavitation area and inhibit cavitation.