Autologous stem cell transplantation usually takes 1~2 weeks before surgery and 4~6 weeks after surgery if everything goes well, the details vary from person to person and cannot be generalized. 1. Hematopoietic stem cell transplantation refers to the transvascular infusion of normal hematopoietic stem cells into the patient to re-establish normal hematopoietic and immune functions after the patient has been pretreated with systemic radiotherapy, chemotherapy and immunosuppression. 2. Procedure and time required (1) Before transplantation: autologous transplantation should be hospitalized before the operation, and subcutaneous injection of hematopoietic growth factor should be given 5~7 days before hematopoietic stem cell collection, and the process of collecting stem cells from peripheral blood usually takes 2~4 hours. The process of collecting stem cells from the peripheral blood usually takes 2~4 hours. The process may need to be repeated for a few days until a sufficient number of stem cells have been collected. The collected stem cells will be frozen and stored for subsequent transplantation. (2) Post-transplantation: Observe the patient’s blood and bone marrow picture, usually 4~6 weeks after the bone marrow picture becomes normal, the patient can be discharged from the hospital. Bone marrow transplantation needs to enter the laminar flow room. Autologous stem cell transplantation, need to go to a regular hospital, the specific operation and medication by a professional physician guidance.