With the continuous improvement of vehicle safety requirements by various collision mechanisms, the safety of automobiles is also rapidly improved and improved. Firstly, it is equipped with active safety, which can prevent accidents from happening, followed by passive safety. The last line of defense to protect passengers is also due to the increasingly strong and safe use of high-strength steel. At the same time, because of the higher cost performance of thermoformed steel compared to other materials, its use has also been popularized in more entry models in recent years.