As the energy and environmental crisis worsens, countries have strengthened their control of energy consumption and emissions in the automotive industry in recent years. The "Energy Saving and New Energy Vehicle Industry Plan" issued by my country stipulates that the average number of passenger cars produced in 2020 Fuel consumption has dropped to 5.0 liters/100 kilometers, and in 2025, this indicator will further drop to 4.0 liters/100 kilometers. In response to this requirement, lightweighting is one of them in the "Energy Saving and New Energy Vehicle Technology Roadmap" released by the Ministry of Industry and Information Technology in October 2016. amp;ldquo; Made in China 2025rdquo; plan clearly requires that by 2020, the average vehicle weight reduction target of 5% to 20% will be achieved through the application of high-strength steel, aluminum-magnesium alloy and other composite materials in automobiles. As an important part of the entire vehicle, the body accounts for about 27% of the weight and only about 11% of the cost. It has great potential for lightweight. As China customers 'awareness of products increases, mature customers' concern for cars is not limited to the basic functions of vehicles, but pays more attention to vehicle handling performance, appearance quality, sealing and anti-corrosion performance, body structure and safety performance. The demand for high performance and high quality of the car body is becoming increasingly prominent. To achieve lightweight, high performance and high quality, three major factors are inseparable from: optimization of body structure design; selection of new materials with high strength and low density for the body; and application of advanced body technology. Among them, mastering the corresponding body technology is the prerequisite and guarantee for the selection of new materials and the design of body structure. Therefore, in order to achieve the goal of leading the industry's development of lightweight, high performance and high quality, the planning, research and development of body technology and innovative application in early development are crucial.  This project mainly carries out research from four aspects: process development planning, synchronous molding process innovation, new process development and application, and digital application of process. It belongs to the field of structural development, involving body process development, application, part design, etc. The overall project results are at the leading level in China. Through years of application accumulation of process development, the development plan and systematic development process for each process of the body have been formulated based on the background of lightweight, high performance and high quality, and a new process development system and corresponding development deliverables have been formulated. Access mechanism. We have carried out research on the forming process of aluminum parts and laser welding of advanced steel and steel connections, and achieved certain results. At the same time, in terms of process, the requirements for simultaneous development of forming are introduced in the early stage of product development. In the early stage of body structure development, process planning and cost control are carried out for the formability of body sheet metal parts from the perspective of forward development, ensuring later production efficiency and product quality. These research results have also answered and solved many industry process problems, such as low-cost and efficient stamping processes, low-cost steel-aluminum connection processes, etc. In the research and application process of the above-mentioned series of innovation points, we have won various awards and independent intellectual property rights. For example, in the field of process innovation, synchronous process innovation won the first prize for the modernization innovation achievements of enterprise management in China's machinery industry. In the development and application of new technology, more patents, papers and so on. Subtotal 6 utility model patents granted, another 2 invention patents granted; 7 published papers, etc.  This project has initially broken through the application difficulties of advanced technology. The results are applied to all body structural systems of SAIC GM, and the direct economic benefits are calculated based on the production and sales of some models in 16, 17 and 18 years.(Saving materials, saving processes, saving fuel consumption and research and development costs, saving labor) reaches 1.225825 million yuan; indirect benefits consider environmental management ((for every 100kg weight loss, carbon emissions within 100 kilometers are reduced by 1.12 kg, and pollution control costs are saved per kg. 15 yuan, each vehicle is assumed to drive 20000 kilometers per year), and the total indirect economic benefits are saved by 20,347702 million yuan, which has positive social significance.