Automobile lightweight refers to the application of high-strength lightweight materials and advanced forming technology under the premise of ensuring the safety and function of the automobile to reduce the number of parts and solder joints, reduce the cost of parts, and ensure that the strength and function of the parts are improved. . Practice has proved that for every 10% reduction in vehicle weight, fuel consumption drops by 8% and emissions drop by 4%. The hot stamping of ultra-high-strength steel is conducive to lightening the weight and improving the safety performance of automobiles, and can obtain reasonable cost performance of automobile components.