M-PTCy vs BuCy in Haploidentical HSCT for Acute Leukemia

Inclusion Criteria: 1. The patients meet the diagnostic criteria for acute leukemia(except APL). 2. Expecting life span is more than 3 months. 3. The patients intended allogeneic hematopoietic stem cell transplantation. Exclusion Criteria: 1. Previously received doxorubicin or other anthracycline therapy, the total cumulative dose of doxorubicin≥360 mg/m2. 2. Cardiac function and disease meet one of the following conditions: 1. Long QTc syndrome or QTc intervalgt≥480 ms; 2. Complete left bundle branch block, grade II or III Degree atrioventricular block; 3. Severe, uncontrolled arrhythmia requiring drug treatment; 4. New York Society of Cardiology class ≥ II; 5. Cardiac ejection fraction (LVEF) lower than 50% or lower than the study The lower limit of the central laboratory test value range; 6. History of myocardial infarction, unstable angina, severe unstable ventricular arrhythmia or any other arrhythmia requiring treatment, clinically serious pericardial disease history within 6 months before recruitment, or ECG evidence of acute ischemia or active conduction system abnormalities. 3. Alanine aminotransferase (AST) and aspartate aminotransferase (ALT) \> 2.5 times the upper limit of normal (ULN); Total bilirubin \> 1.5 times upper limit of normal; Serum creatinine \> 1.5 times the upper limit of normal. 4. Suffering from other malignant tumors in the past or at the same time ; 5. Exclude patients with severe active infection or other underlying diseases who cannot tolerate chemotherapy; 6. Human immunodeficiency virus (HIV) infected patients (HIV antibody positive); 7. Active hepatitis B and C infection； 8. Pregnant women, lactating women, and patients who refuse to take effective contraceptive measures during the study; 9. Severe mental disorders who do not cooperate with treatment; 10. Judgment by the investigator , There are patients who are not suitable to participate in this study.