Grinding force is an important parameter affecting surface quality in the grinding process of nickel-base superalloy.To build the finite element simulation prediction model of grinding force,based on the actual surface topography of electroplating grinding head,the overall model of grinding head with random particle height and overall compliance with 2D Gaussian distribution was established by calling distribution function method.Finite element simulation and grinding force test were carried out.The results show that the whole grinding head model has the random characteristics of real grinding head,and the advantage is that the grinding characteristics of multi-abrasive interactions are fully considered; in the grinding simulation process,three typical stages of scratching,ploughing and chip forming can be observed,which are highly restored to the actual grinding process; the tangential and normal grinding forces per unit width show the same variation trend under different parameters,and the average error is 8.2% and 8.6%,respectively.The simulation model has good prediction effect on grinding force of nickel-base superalloy.