China since the early 1970s began to study the CVD coating technology, because of the strong technical specificity, the research unit is not much. In the mid-1980s, China's CVD tool coating technology to achieve the level of practical development, technology and the level of the international level at the time, but in the subsequent 10 years of development is relatively slow (similar to foreign research); The research and development of MT-CVD technology and equipment is expected to be completed in 2001. According to the research objectives, the technology and equipment will reach the international advanced level. The research of PCVD technology in China will start at the end of this year. In the early nineties, PCVD process technology is mainly used for mold coating, cutting tools in the field of application is still very limited. Overall, the overall level of development of domestic CVD technology and the gap between the international level is not until the MT-CVD technology successfully developed, China's CVD tool coating in the field of the overall level will be able to keep pace with the international advanced level.