The success rate of stem cell transplantation is related to the type of transplantation and the type of disease, e.g. the success rate of autologous transplantation is more than 90%, allogeneic is 60%~70%, acute myeloid leukemia is 50%~60%, and lymphoma is about 70%. Stem cell transplantation can be divided into 2 types: autologous hematopoietic stem cell transplantation and allogeneic hematopoietic stem cell transplantation. 1. Autologous hematopoietic stem cell transplantation is simple and has a high success rate, usually more than 90%. 2. The success rate of allogeneic hematopoietic stem cell transplantation is 60%~70%, mainly because the transplantation of other people’s bone marrow or peripheral blood may result in the occurrence of graft-versus-host disease. 3. The success rate of stem cell transplantation varies depending on the type of disease, such as 50%~60% after stem cell transplantation for acute myeloid leukemia and 70% after stem cell transplantation for non-Hodgkin’s lymphoma. The success rate of transplantation is related to the patient’s condition, organ function, physical status, autoimmune reaction, transplantation complications, donor matching status and the degree of remission of the recipient’s condition, and the comprehensive medical level of the transplantation hospital. For the same disease, patients with different physical conditions and different stages of the disease have different treatment methods and medications, which should be standardized under the guidance of doctors.