Dalian shot blasting processing, shot blasting cleaning, high productivity. Due to the use of a new type of shot blasting device, the shot with the ejection volume of 110 ~ 260 kg / min and the ejection speed of 50 ~ 75 m / S is thrown to the workpiece, and the cleaning can be completed in a few minutes. For workpieces with large batch or large size, multiple shot blasting devices can be used for shot blasting at the same time. It can clean, color and polish the surface of parts. After shot blasting, the attachments, thin edges, flying wings and spots on the surface of the workpiece can be removed, and the scratches can be eliminated, so that the workpiece presents the natural color of the substrate. Eliminate surface stress concentration. During the cooling process of parts, due to uneven wall thickness and inconsistent cooling speed, stress concentration occurs on the surface. After shot blasting, the surface structure can be improved, the concentration of surface stress (tensile stress) can be eliminated, the fatigue strength can be improved, and the surface hardness can be slightly improved.