Different leukemia types correspond to different chemotherapy regimens, which should be treated differently, including the standard “3+7” regimen, multi-drug combination chemotherapy, hydroxyurea, phenylbutyric acid nitrogen mustard and so on. 1. AML non-M3 type: the usual chemotherapy regimen is anthracycline for 3 days and cytarabine for 7 days, the standard “3+7” regimen. The main anthracycline drugs are erythromycin and desmethoxymethyl erythromycin. 2. Acute lymphoblastic leukemia: often use multi-drug combination chemotherapy, vincristine, anthracyclines, glucocorticosteroids, cyclophosphamide, menthacinase composition of the program. High-dose methotrexate is often applied to combat central nervous system leukemia. 3. Chronic myeloid leukemia: Hydroxyurea is often used for early control of blood or patients who cannot tolerate imatinib. Other drugs include cytarabine, hypertriglyceride, arsenious acid and so on. 4. Chronic lymphocytic leukemia: commonly used drugs are nitrogen mustard phenylbutyrate, ibrutinib, and also benzamustine, cyclophosphamide, fludarabine and so on. Chemotherapy and medication for leukemia need to be carried out under the guidance of doctors, and it is recommended that specialists choose the appropriate chemotherapy plan according to the specific conditions.