For the rear side inner panel of an automobile, its forming process was analyzed, and the rapid modeling and simulation of drawing diesurface were conducted by Autoform to predict the cracking, excessive thinning and wrinkling defects in the drawing process. Then, the refined modeling design of dieface was built by NX with the result of forming and relevant experience, and the whole process simulation and springback compensation of optimized dieface were carried out. The results show that the dieface after refined modeling design successfully solves the drawing cracking, excessive thinning and wrinkling defects, and the springback is controlled by compensation. The maximum thinning rate is reduced from 0.405 to 0.22, the maximum wrinkle coefficient is reduced from 0.11 to 0.008, and the maximum springback is reduced from 1.936 mm to 0.315 mm. Finally, the stamping experiment is carried out, and the obtained parts are qualified which verifies the effectiveness of the refined modeling design of dieface.