Abstract: This study explores in depth the problems of cracking, wrinkling, and material performance failure that occur during the stamping process of the heat shield under the exhaust manifold of automobiles. By using AutoformR8 software, this study repeatedly designed the geometric shape, size, and layout of the process supplement surface, predicted potential problems in the design phase, and made corresponding adjustments and optimizations based on them. By precise control, we have mastered the quality indicators of the formed parts, including the thinning values of each part of the sheet metal and the final forming limit diagram of the sheet metal. This study provides a theoretical basis for the formation of the heat shield under the exhaust manifold, while improving the machining quality of the parts, shortening the production cycle, and providing important reference value in reducing costs.