Curcumin has antioxidant, anti-inflammatory and bactericidal effects, more and more are added to food and medicine to improve human immunity. Curcumin mainly exists in the stems and leaves of Curcuma, but the content is not high (2 ~ 9%), so in order to get more curcumin, we need very effective extraction methods. Ultrasonic extraction has been proved to be a very effective method for curcumin extraction.