Abstract: Body panels such as fenders，engine cover，trunk lid，doors，etc.are mostly made of thin steel prefabricated，they are squeezed by the collision or bump，which will cause permanent deformation.This damage often occurs only in the body of the local range.Its repair should be based on the form and extent of damage to take the appropriate repair methods.In the process of automotive sheet metal spray，the usage of computers for data acquisition and processing guides technicians to operate and repair quality inspection and monitoring.