Cuttlefish is also called cuttlefish and mullet, because it has no spine. Although it is called fish, it is actually a mollusk living in the ocean. Squid is not only delicious and nutritious, but also can be used as medicine all over the body. The inner shell of squid is called cuttlebone and cuttlefish bone in traditional Chinese medicine. The cuttlebone occupies an important position in traditional Chinese medicine. Compendium of Materia Medica records that cuttlebone "treats all blood diseases". The cuttlebone has astringent, hemostatic, antacid and analgesic effects, and it is the main medicine for treating stomach diseases. Chinese patent medicines for treating stomach diseases prepared with cuttlebone have played a significant role in treating stomach diseases. Cuttlebone is a good medicine for all kinds of bleeding. There are many effective ways to treat bleeding with cuttlebone in our country. For the treatment of gastrorrhagia, cuttlebone and bletilla striata can be ground into fine powder and taken orally. For the treatment of pulmonary tuberculosis and hemoptysis, cuttlebone, agrimony and madder can be decocted and taken. For bleeding caused by trauma, cuttlebone, bone meal and pollen typhae can be equally ground and sprinkled on the wound for treatment. Cuttlebone can also be used for tooth extraction and nasal surgery to stop bleeding. The swollen part at the end of the squid rectum is called the ink sac, which is a container for squid to cast ink to its strong enemy when it is in danger. The main component of squid ink is squid ink melanin, which is a systemic hemostatic and can be used for the treatment of gastrointestinal bleeding, functional uterine bleeding and pulmonary hemoptysis. In addition, pharmacological research also found that squid ink has a preventive effect on acute radiation sickness. Cuttlefish bone can obtain a compound after certain preparation, which has certain anticancer effect. In addition, antiviral substances can be extracted from squid. Cooking squid meat can treat women's blood deficiency amenorrhea. Mullet eggs can stimulate appetite and promote diuresis. Squid is really covered with medicine.