This study was aimed to investigate the curative efficacy of allogenetic hemopoietic stem cell transplantation (allo-HSCT) using FLAG and modified BUCY conditioning regimen for patients with refractory and relapse or high risk hematologic malignancies. The therapeutic effect of allo-HSCT with FLAG and modified BUCY conditioning regimen on 10 patients with hematologic malignancies was analyzed. 10 patients included 2 cases of relapse (1 early relapse, 1 progression) and 7 cases of refractory (2 CR(2), 1 CR(3) and 2 PR and 1 NR) and 1 CR(1) with high risk. Among 10 cases 8 cases was diagnosed as AML, 1 case as pro-T lymphoblast lymphoma/leukemia and 1 case as spleen marginal zone lymphoma. The results showed that implantation of all the patients was successful. The relapse-free median survival time of 8 cases was 164 days (57 - 442 days) and survived up to now, 2 cases died (1 case died of pulmonary infection, 1 case died of fungus pulmonitis). In conclusion, the curative efficacy of allo-HSCT using FLAG and modified BUCY conditioning regimen for patients with refractory and relapsed hematologic malignancies is satisfactory.