Surface treatment is carried out on the inner and outer walls of steel pipes using a shot blasting machine to remove oxide coatings and welding slag, resulting in a metallic luster and an increase in surface area, which is beneficial for ultraviolet radiation. Suitable for industries such as petrochemicals, steel, urban centralized heating, and centralized drainage. Steel pipe shot blasting machine/steel pipe outer wall shot blasting machine is a combined cleaning machine for cleaning and steel outer walls. It cleans the outer surface of the steel pipe by blasting and throws it onto a clean surface, thus removing surface oxides. Used before welding or painting the outer surface of the pipeline.