Chemotherapy is mainly used for the treatment of acute myeloid leukemia and acute lymphoblastic leukemia, and the cumulative number of chemotherapy treatments is about 5~10 times. Chemotherapy is a routine treatment for leukemia, mainly for acute myeloid leukemia and acute lymphoblastic leukemia, and the overall treatment time is about 2~3 years. Usually, chemotherapy is given every 1 to 2 months during the first year, and the next chemotherapy can be given after the blood picture recovers. From the second year onwards, maintenance chemotherapy is usually given, and often oral chemotherapy is sufficient, such as targeted drugs. Regular review should be done after chemotherapy to prevent relapse. Leukemia patients with high prognostic risk need to receive hematopoietic stem cell transplantation during the remission period, specific can consult a professional physician’s opinion, the use of medication and treatment under the guidance of the physician.