Catenary shot blasting machine is suitable for small iron castings, steel castings, forgings and stamping parts shot blasting cleaning, especially suitable for forging, casting cleaning, to remove the surface of the work pieces of sand, rust, oxide scale, dirt, etc. , the surface of the work piece is made of metal, the internal stress of the work piece is eliminated, the fatigue resistance of the work piece is improved, the adhesion of the paint film is increased, and the surface and internal quality of the work piece are improved finally. The anti-corrosion ability of mechanical products and metal profiles is improved, the fatigue resistance of steel is improved, and the service life is prolonged. USES: hanging chain type shot blasting machine is divided into continuous, step-by-step, product-release type along with the chain movement. This machine is suitable for surface cleaning and shot blasting of multi-variety, medium and small batch iron castings, steel castings, forgings and steel structural parts. It is an ideal choice for automobile, tractor, diesel engine, motor valve and other industries.