The working principle of the round tube polishing machine: through the high-speed rotating polishing wheel and the rotating guide wheel, the round tube automatically moves forward while using the polishing wheel to rub the surface of the round tube to achieve the polishing effect. By adjusting the feed amount of the grinding head, the amount of polishing can be selected, and by adjusting the feed speed of the workpiece, the ideal polishing effect can be achieved. Polishing wheels can be used in a variety of ways, and commonly used ones include grinding wheels, hemp wheels, cloth wheels, nylon wheels, etc. After polishing, the surface of the round pipe can achieve a mirror effect, and can polish stainless steel pipes, iron pipes, aluminum pipes and shaft parts, etc. The polishing quality is higher than the polishing process..