Chitosan is known as one of the six vital elements of the human body. It has the title of a functional health food. It has the function of immune strengthening, inhibiting aging, preventing diseases, promoting healing of diseases and regulating human physiological functions. Therefore, it has the function of anti-cancer, inhibiting the metastasis of cancer cells, improving the immune function and detoxifying the liver function. It has good effects on the body suffering from diabetes, liver and kidney diseases, hypertension, obesity, prevention of cancer cell lesions, as well as the auxiliary conditioning and treatment of cancer and tumor patients undergoing radiotherapy. In addition, it has a significant auxiliary therapeutic effect on the body to lower cholesterol, lower blood lipids and blood sugar. In addition, it is also widely used in beauty and body hair protection.