Diamond film is known as a new type of functional material in the 21st century. This is mainly because the diamond film has a hardness very close to that of natural diamond, high elastic modulus, low friction coefficient, extremely high thermal conductivity and high room temperature resistivity, excellent insulation and chemical stability, and high It has excellent properties such as high electrical and hole mobility and transparency in a wide range of light waves, and it has a wide range of application prospects in high-tech fields such as machinery, electrical, biomedicine, aerospace, and nuclear energy. Since the mid-1980s, in the upsurge of research and development of diamond films that swept across the globe, the excellent properties of diamond have attracted the investment of many scientific and technological workers. From 1970, Soviet scholar Deryagin et al. used chemical vapor deposition (CVD) to realize the transformation from graphite to diamond under low temperature and low pressure conditions, to the early 1980s Japanese scholar Setaka et al. initially demonstrated in the research of chemical vapor deposition of diamond films The practical application was possible, and substantial progress began to be made in the early 1990s. This opens up a broader world for the further development and application of diamond film materials. The performance of the diamond wire drawing die