The skin of raw Polygonum multiflorum Thunb. is deep red, and the cut surface is white, which is crisp and has a circle of graphics. The juice is bitter, while the prepared Polygonum multiflorum Thunb. is processed by black beans, which is very dark and hard, and has a medicinal flavor of traditional Chinese medicine. Songshan Polygonum multiflorum tea can reduce blood fat and control fatty liver. It contains prepared Polygonum multiflorum Thunb, hawthorn, chrysanthemum and xylitol. Because it is food, it can be used for a long time.