The square tube derusting and polishing machine is mainly used for instrument machinery, vehicle accessories, hardware manufacturing, and surface derusting and polishing, utilizing round tubes and rods, offering ease of operation and cost savings. The machine enables automatic surface polishing. It is suitable for small and metal workpieces, with automatic surface gloss and burr removal. It can be operated by a single person for multiple devices. Primarily used by customers in craftwork factories, hardware factories, sanitary ware factories, and electronic factories. This equipment is relatively simple to operate, requiring minimal skill from the operator. It enhances production efficiency, reduces labor intensity, saves production costs, improves product quality, and minimizes quality variations.