Diamond film is a kind of competitive material with its outstanding electrical, optical, thermal and mechanical properties as well as high anti-radioactive intensity and high physical and chemical stability. Compared with micro-crystalline diamond, Nano-Crystalline Diamond(NCD) is with more slippery surface, lower friction factor and better performance in field ejection, so that, it becomes the new hotpot in the research of diamond films. This essay focuses on the CVD NCD film. The fabrication and pr...