Chronic myelomonocytic leukemia(CMML)is a clonal disease derived from bone marrow hematopoietic stem cells,with a poor prognosis.Allogeneic hematopoietic stem cell transplantation(allo-HSCT)is one of the curable methods for CMML.The outcome of patient transplantation is influenced by vari-ous factors such as disease characteristics and comorbidities.Based on the existing prognostic stratification sys-tem,screening suitable CMML patients for transplantation and early transplantation is beneficial for their long-term survival.Doctors can evaluate the survival status of CMML patients after transplantation based on the newly developed transplant prognosis model and make targeted medical decisions.