Suitable for batch processing of small products. Due to the use of a circular water tank, the workpiece can freely roll, resulting in faster and more uniform processing speed for small workpieces. For the internal holes and blind areas of small hardware and trinkets, the treatment effect is excellent, which can achieve the effect of removing oil stains, burrs, knife lines, scratches, welding spots, and oxide skin to improve the surface brightness of the product. This is an incomparable feature of other types of polishing equipment. The operation is simple, one worker can operate multiple equipment at the same time, and realize the automatic blanking function.