Abstract: In order to improve the zone polishing technology, material removal theoretical model of zone polishing technology is founded based on Preston equation. Considering all influencing factors, such as rotating speed ratio, eccentric distance, pressure distribution between polishing lap and workpiece, the mathematical model which is about the relationship between the material removal and the influencing factors is established. The theoretical analysis and experiment results show that: material removal efficiency is increased as the rotating speed ratio and eccentric distance increase. When the rotating speed ratio is near to one, the removal distribution is more uniform. The material removal efficiency of edge is quickly reduced as the edge of workpiece holds out of polishing lap. The zone polishing technology is improved through researching the technological parameters of the theoretical model, and the polishing efficiency and stability are increased.