Rice bran extract is the seed coat extract of the gramineous plant OryzaSativaL, which contains unsaturated fatty acids, tocopherols, tocotrienols, lipopolysaccharides, edible fiber, squalene γ- Oryzanol and other physiologically active substances. These substances have significant functions in preventing human heart and cerebrovascular diseases, anticancer, enhancing immunity, reducing blood lipids, preventing constipation and obesity, and are important raw materials for health food, medicine, cosmetics and chemical industry.