The steel structure shot blasting machine is a multifunctional steel pretreatment equipment for large-scale cleaning of structural parts, H steel and section steel. The arrangement of the shot blasting device is multi-angle, and the world's advanced double-disc blade shot blasting device is selected to project high-speed and dense projectile beams to strike all parts of the steel in the original state for three-dimensional cleaning, so that the particles on each surface of the steel are cleaned. The rust layer, welding scars, oxide scales and their dirt fall off quickly, and a smooth surface with a certain roughness is obtained, which improves the adhesion between the paint film and the steel surface, improves the fatigue strength and corrosion resistance of the steel, and improves the inner quality of the steel. quality and prolong its service life.