Dalian sand blasting processing sand blasting is to use compressed air as the power to form a high-speed jet beam to spray abrasives (steel sand, brown corundum, glass beads, emery, etc.) to the surface of the workpiece to be treated at high speed, so as to change the appearance of the outer surface of the workpiece. Due to the impact and cutting effect of the sand on the workpiece surface, the workpiece surface can obtain certain cleanliness and different roughness, and the mechanical properties of the workpiece surface can be improved, Therefore, it improves the fatigue resistance of the workpiece, increases the adhesion between it and the coating, prolongs the durability of the coating film, and is also conducive to the leveling and decoration of the coating. Sand blasting uses compressed air as the power to form a high-speed jet beam to spray the abrasive to the surface of the workpiece to be treated at high speed, so that the appearance of the outer surface of the workpiece changes physically and meets the quality requirements.