The precision processing of pepper balls is divided into several processes. First, pepper balls need rough grinding, which is only a matter of fast and slow efficiency, and generally does not affect the precision. The higher the precision requirements of pepper balls, the higher the requirements for the technology and equipment of fine grinding process. First of all, the precision of pepper ball grinding machine should be high. The grinding disc and grinding wheel of pepper ball grinding machine should be closely matched, and there should be no gap. If there is gap, the pepper ball will vibrate during grinding, and the accessories will shift, which will affect the precision of plastic ball. Another factor affecting the precision of pepper ball is the grinding wheel for grinding. If the grinding wheel is too fine, the pepper ball will slip between the grinding disc and grinding wheel for a long time. Plastic will be deformed, which will affect the accuracy of pepper balls. If the grinding wheel is too thick, the surface of the ground plastic balls will be too rough. Due to the influence of roughness, even after polishing, the accuracy will not be very high. Therefore, it is necessary to choose suitable grinding discs and grinding wheels for pepper balls.