According to the dimension and structural characteristics of automobile tailgate inner & outer panels, the stamping direction, technological analysis of parts and design key content of each step were researched. And the finite element simulation analysis was carried out by using Autoform software, the feasibility of forming two parts in one die process was determined. Then, the advantages of forming two parts in one die process were analyzed by comparing the advantages and problems of forming two parts in one die for tailgate inner & outer panels. Furthermore, in view of the difficulty in opening die of OP40 encountered during the debugging of die, the improvement measure to balance the pressure of nitrogen spring in the side of tailgate inner & outer panels was proposed. The result shows that forming two parts in one die process for automobile tailgate inner & outer panels can effectively reduce the die cost, improve production efficiency, save workshop operating cost and reduce the die storage space. Thus, the formed parts are good without obvious quality defects such as wrinkling and cracking etc., which meet the requirements of mass production.