This paper mainly elucidates the influences of bio-inspired surface microstructure parameters such as shape,size and distribution density on the tribological effect in air,oil and water.In air,the bio-inspired microstructure could store wear debris and particles,and the accumulating wear debris on sliding surface would be eliminated.Thus,the tribological characteristics of sliding surface could be improved.Whereas in oil and water,the hydrodynamic lubrication chambers or films would be formed on the bio-inspired microstructure,which causes the load bearing capacity to be enhanced and the friction coefficient to be decreased.Therefore,the bio-inspired surface microstructure could reduce the friction coefficient and enhance the wear resistance.