With the trend of automobile lightweight, the use of plastic parts in automobiles is increasing. Developed countries regard the amount of plastic used in automobiles as an important indicator to measure the level of automobile design and manufacturing. German automobile plastics account for 15% of the overall material. In recent years, my country's automobile industry has developed rapidly. At present, the annual output of automobiles exceeds 4 million. Referring to foreign trends, the annual use of modified plastics in the automobile industry will exceed 500,000 tons. With the rapid development of science and technology and the continuous progress of new materials and new processes, people nowadays put forward a series of higher requirements for the quality of automobiles, mainly in terms of comfort, safety, environmental protection and aesthetics. In this context, the lightweight and low cost of automobiles has become the dominant factor in industrial design.

　　Plastic parts are one of the future development directions of the automotive industry, and their molding processing technology is getting more and more attention from the industry. As the development direction of auto parts, the production of plastic parts should not only realize energy conservation and environmental protection and diversification of functions in production, but also simplify the manufacturing process and process. Processing plastic parts into auto parts will naturally reduce the use of metal. With the increasing use of plastic parts, the cost of using the car and the weight of the car body will also start to decrease, and it can improve the energy saving and reduction of the car row effect.

　　In the production process of automobiles, the metal parts of automobiles gradually develop into plastic parts, and the application of plastic parts is becoming more and more extensive, including car seats, ceilings, handles and lights, etc. However, in the molding process of automotive plastic parts, there are still some technical instabilities, which make the processing technology of automotive plastic parts unable to play its due level. In the production process of automotive plastic parts, relevant personnel should combine the actual production situation to find out the problems existing in the actual product processing process, and then summarize and analyze them to determine the practical strategy for future industry development.