Automotive sheet metal is a technical means of automobile repair. In this respect, automotive sheet metal is equal to the repair of automotive sheet metal, which means that the car body should be repaired after the collision, that is, all the work except the anti-corrosion and decorative painting of the car body. Such as body damage analysis, body measurement, shaping, stretching, correction, stress relief welding, assembly adjustment of body accessories, etc. The following are the situations that need sheet metal repair: 1, concave-convex damage: concave-convex damage needs sheet metal repair. The bulge of the metal plate can be repaired by hammering or jacking. Different treatment methods are used for the same situation. Of course, the process flow is different with different concave and convex degrees, and the material of the fuselage should be considered. 2, warping, skew deformation: body warping, skew deformation sheet metal repair methods Sheet metal parts will be warped, skewed and other deformation phenomena due to impact, scraping or improper use. At this time, it can be eliminated by mechanical method or flame heating percussion method. 3. Damage or perforation: Repair method of damaged or perforated sheet metal The surface of sheet metal parts damaged or modified by impact can be repaired by application. At present, the main adhesives used are epoxy resin adhesive, phenolic resin adhesive and copper oxide adhesive. 4. Cracks or local serious damage: In the past, automobile repair mostly used welding or repair methods, but at present, 4S shops usually adopt direct replacement treatment.