Black rice is a kind of rice for both medicine and food, which belongs to glutinous rice. Black rice is a kind of characteristic variety formed by long-term cultivation of gramineous plant rice. There are two types of grain types, Indica and japonica, and the grain quality can be divided into waxy and non waxy. Brown rice is black or brown. Black rice is dark in appearance and rich in nutrition. It has the reputation of "Black Pearl" and "the king of rice in the world". Many places in China have production, including Shaanxi black rice, Guizhou black glutinous rice, Hunan black rice, etc. Black rice is black or dark brown, rich in nutrition, high in food and medical value. In addition to porridge, it can also make various nutritious food and wine, known as "Black Pearl" and "the king of rice in the world". The most representative black rice in Yangxian County, Shaanxi Province, has been known as "medicine rice", "Gongmi" and "shoumi" since ancient times.