The production of auto sheet metal parts mainly depends on mold. In the entire cycle of model design mold design, manufacturing and commissioning, mold design, manufacturing and commissioning account for about 2/3 of the time, which has become the main factor restricting the transformation and replacement of automobiles. This is because sheet metal stamping is a very complex plastic forming process, many factors directly or indirectly affect the forming results. The classical sheet metal forming theory can only analyze the sheet metal forming process of simple sheet metal parts such as bending parts and cup parts. Sheet metal parts with complex shapes such as car covers are powerless. As a result, the design of automobile die is still based on the experience and analogy of designers. Due to the lack of more accurate and reliable quantitative analysis and calculation, the designed and manufactured die must go through repeated pressure testing and modification, and sometimes even modify the design of the original product. Only after scrapping the remaking die can the qualified product be rushed out.