Abstract: The back door inner panel of car is a typical part of the car body. According to the stamping processability of the parts, five forming steps of the parts are designed, namely: blanking -draw forming-trimming punching-trimming punching- flanging trimming forming punching. According to the process design content, using UG and AutoCAD software, five sets of molds for stamping and forming The back door inner panel of car are designed. According to the designed mold size, the stamping parts of the back door inner panel of car are obtained. According to whether the parts are qualified or not, the reliability of the process and the reliability of the mold design are verified.