Since the 1920s, metal products, toys, hardware and other industries have started to use simple mechanical equipment such as punching machines and corresponding dies to process the blanks or parts of products, including "knife-edge dies" for blanking and punching and "dock dies" for metal stretching. At that time, the stamping equipment used in various factories was not very powerful, and most of them were manual pedals. In addition to using a small number of simple general equipment, mold processing is mainly manual operation, so the mold accuracy is not high and the damage rate is high. It was not until the early 1940s that the cold stamping die of hydraulic press appeared. /kloc-after the public-private partnership in the 1950 s, the precision of cold stamping die was improved by adding grinders, milling machines and sawing machines, as well as hardness testers, external and internal diameter testers and block gauges. With the extensive use of stamping machine tools in product production, from 1960 to 1970, the cold stamping die has developed from the initial blanking and single die in Dan Chong to the blanking and punching compound die. Due to the appearance of cold die holder standard parts, the die design structure is diverse and the accuracy is improved. At the same time, with the progress of heat treatment technology and the perfection of detection means, the service life of cold stamping die has been increased by 5 ~ 7 times. During this period, due to the successive use of machine tools such as form grinding, electric pulse and wire cutting machine tools, and the use of cemented carbide as die material, the manufacturing technology of cold stamping tools has made new development. The service life of cemented carbide cold stamping die has jumped from 35,000 times to more than 6,543.8+0.5 million times. Due to the improvement of molding technology by designers, a large number of composite molds with automatic feeding, automatic distributing and receiving devices have come out. After the introduction of copying milling machine, the mold core with the same shape can be made of gypsum, wood mold or physical object, which provides convenience for making composite wire drawing mold and ensures the accuracy. After 1970s, cold stamping dies were processed by diagonal cutting machine. The punch (punch) and the die could be quenched first and then cut and assembled, which replaced the complicated process of making cold stamping dies: heat treatment-assembly-deformation correction. The smoothness of the die is also improved by one level, and the accuracy can reach 0.01mm. Later, various professional mold factories and mold workshops have widely used wire cutting machines to manufacture cold stamping molds.