Rhino horn has been removed from medicinal value. The rhinoceros is a rare and endangered animal under international protection, and our government has explicitly prohibited the use of rhino horn, which has been removed from its medicinal value. Rhinoceros horn is conical, tapering from the bottom upward, slightly curved, length varies. The surface is black, the lower part of the color gradually light, gray-brown. Rhinoceros horn is formed by the epidermal keratin, and there is no bone center inside. The main components of rhinoceros horn include keratin, cholesterol, calcium phosphate, calcium carbonate, etc. It also contains other proteins, peptides, free amino acids, guanidinium derivatives, sterols and so on. Rhinoceros is a rare animal and needs to be protected, therefore, rhino horn cannot be used for medicinal purposes.