In grinding process of SiC ceramics aspheric surface, the motion trajectory of grinding wheel has great influence on the
surface forming. The paper provides mathematical models of grinding wheel movements; analytical simulation was done
to describe the trajectories of the grinding wheel in manufacturing an aspherical workpiece. The effect of grinding
parameters (including the rotation speed of the workpiece, the feed rate of grinding wheel etc.) on the aspheric surface
coverage rate was conducted and discussed in detail. An experimental study was done according to the simulation results
and an aspheric surface with form error less than 10μm was gained.