Abstract: To shorten the debugging cycle of die production preparation, reduce the die production costs and improve the coloring rate of the trimming die pressing, based on the multiple production platforms of automobile OEMs, through the application of various types and structures of trimming dies for door outer panels, fenders and roof outer panels, the most common problems, repair processes and precautions in application of polyurethane pressing plates in automotive trimming dies were summarized in detail, especially, the pre-treatment of repair process and the repair after curing were particularly important. Then, the usage scenarios were identified, and the spot inspection and maintenance methods for stamping dies using polyurethane pressing  were recommended. The analysis results show that replacing the traditional rigid pressing materials with flexible polyurethane pressing material can save at least RMB 10,000 in production costs and RMB 8,200 in labor costs for a single set of die, shorten the debugging cycle of die production preparation by 10 days.