Curcumin, a kind of yellow phenolic substance, is extracted from the turmeric which belongs to zingiberaceae. It is not only a sort of natural pigment which is widely used in food industry, cosmetic fields, feed industry and so on, but also a kind of new natural oxidation inhibitor which is widely applied in medical field as anti-oxidant, anti-inflammatory, anti-atherosclerosis, lowering lipid, etc. Curcumin has strong functions of thermal stability, high colouring, bright in colour, lowering lipid, scavenging free radicals, low toxicity, etc, therefore it has great market development prospects.