Die-cutting products are widely used in automobile manufacturing and electronic industry. Die-cutting products are divided into many kinds, such as double-sided adhesive, protective film, dust-proof net, reflector, polarizer and so on. The shape, size and processing difficulty of each product are different. Some products can be processed at one time, and some complex products need to be processed many times. Round-knife die-cutting machine is playing an increasingly important role in the die-cutting industry and attracts more and more attention because of its high efficiency and the ability to achieve a large number of rapid online operations. Round knife die is a key part of die-cutting production, and its frame method is also one of the necessary skills of round knife die-cutting master.