1.Treatment principles of aplastic anemia: early, full course of treatment (because the treatment mostly takes effect after 2-3 months, some even more than half a year), slow reduction, in addition to the combination of drugs such as cyclosporine A (CSA) combined with anti-thymocyte globulin (ATG) is also a very important principle. 2. Treatment: (1) hematopoietic stem cell transplantation; (2) combined immunosuppressive therapy; (3) hematopoietic therapy, such as androgens, hematopoietic growth factors, etc.; (4) symptomatic supportive therapy, such as active control of infection, bleeding, anemia and protection of organ function, etc. (1) For acute/heavy aplastic anemia, the main choice is hematopoietic stem cell transplantation or combined immunosuppressive therapy (CSA+ATG). The specific choice depends on the age of the patient, generally under 20 years of age first choose hematopoietic stem cell transplantation; 20 to 45 years of age can consider hematopoietic stem cell transplantation can also choose combined immunosuppressive therapy, depending on the specific situation of the patient; patients over 45 years of age first choose combined immunosuppressive therapy. (2) Chronic aplastic anemia is generally treated with comprehensive therapy, CSA, androgens, and hematopoietic growth factors if necessary. (3) Symptomatic supportive therapy is necessary for both patients with chronic or acute aplastic anemia.