Immunotherapy is a means to treat diseases by regulating the immunity of the body and is commonly used in the treatment of various tumor diseases. The specific treatments need to be decided by doctors according to the type of disease and condition, and there are several common ones as follows: 1. Classification according to the effect of treatment on immunity: 1. Immune-enhancing treatment: Applicable to patients with low immune function, common specific treatments, such as vaccine injection, antitoxin, tumor vaccine, can achieve the purpose of preventing infectious diseases, neutralizing toxins and anti-tumor. Non-specific treatment is commonly used for non-specific antigens, levamisole, and Chinese herbal medicines such as dang ginseng and astragalus, which are applicable to cancerous diseases such as breast cancer and lymphoma. 2. Immunosuppressive treatment: By inhibiting the function of immune-related cells such as macrophages and neutrophils, the abnormal elevation of immune response is relieved and the inflammatory response and damage of the organism are reduced. It is suitable for the treatment of recalcitrant autoimmune diseases, chronic inflammation, rejection after organ transplantation and other diseases. Second, according to the classification of therapeutic agents: 1, molecular therapy: commonly used polyclonal antibodies, genetically engineered antibodies and other types of antibodies, recombinant vector vaccines, synthetic peptide vaccines and other molecular vaccines, as well as exogenous cells, cytokine antagonism method for treatment; 2, cell therapy: commonly used inactivated tumor vaccine, isomeric tumor vaccine and other cell vaccines, as well as stem cell transplantation, secondary immune cell therapy and CAR-T therapy, etc.; 3. Immunomodulatory therapy: biological response modifiers such as BCG vaccine, thymidine and S. typhi lipopolysaccharide are commonly used, as well as immunosuppressive therapy such as glucocorticoids, cyclophosphamide and cyclosporine. In addition, immunotherapy can also be divided into active immunotherapy and passive immunotherapy, etc. Various classifications of treatment modalities may cross, and the most appropriate treatment needs to be selected according to the patient’s condition.