1. Grinding with abrasive belts, high efficiency, low noise, and less dust. 2. Since the surface roughness is reduced after the abrasive belt is used, it can be reused. In grinding with a slightly higher level of abrasive belt, the cost is correspondingly reduced. 3. The workpiece rotation and lateral feed are variable frequency step less speed regulation to further improve work efficiency. 4. The whole process of air pressure floating tracking grinding head grinding technology can solve the phenomenon that the roundness of the tank is not uniform and the high point is excessively polished, and the low point is not polished so that the polished workpiece has a good consistency. 5. Abrasive belts improve the grinding efficiency and prolong the life of the belt.