This paper is mainly to investigate and analyze the various appearance problems caused by the pro-duction process of plastic parts in the current automobile industry,As the product requirements of customers in the automobile industry are constantly increasing year by year,To meet the needs of our customers,Improve customer satisfaction,This paper focuses on the investigation and analysis of the appearance of the bumper,Va-rious risk processes from the formation of material particles to the vehicle are investigated and combed,Finally,through the analysis of the product mold structure and the structure of the product and the action mode of the production process,To confirm the subsequent optimization direction and the product verification after product optimization,So as to fundamentally solve the appearance defects of the product,To meet the needs of our cus-tomers,Improve customer satisfaction.