Abstract: Surface topography of grinding wheel has tremendous influence on grinding process and machined surface quality,but it is difficult to describe the surface topography of grinding wheel due to the randomness of abrasive grains distributed on grinding wheel surface.Through sampling and data processing for grinding wheel topography,the mathematical equation of grinding wheel topography are gained by combining statistical theory and Johnson transformation method,based on which the grinding wheel topography are simulated.Some parameters of Birmingham 14 are chosen to compare the measured topography and simulated topography.The results indicate that there is a good consistency between the two,while the average deviation of six parameters is only 2.97%.It verified the correctness of the simulation method adequately.