In the past 40 years, the graphite die used in hot pressed diamond drill bit has made great progress in China.Based on the experimental analysis of graphite mould samples at home and abroad, and the oxidation mechanism of carbon materials and its influence factors are deeply research, our company made the following improvement: improve the hot pressed diamond geological drill bits with graphite mould dimensional accuracy, surface finish, effectively reduce the tire body or a set piece of metal bond, reducing the speed of the oxidation burning loss of graphite mould, manufacture aspect, our company adopts the ultrafine carbon material particles to produce high resistivity, high graphitization degree, high strength, low ash, micro porosity graphite mould.This is the development direction to catch up with the world advanced level, and it is also an effective way to make the graphite mould for hot pressed diamond drill bit with high precision and high service life.