The process of hematopoietic stem cell transplantation includes: 1. Pre-transplantation preparation: transplantation is selected when the patient is in good condition. Before transplantation, the donor and the patient are subjected to a full-body physical examination, removal of infected lesions, and air disinfection in the reservoir. Patients enter the cabin about 1 week before the stem cell transfusion, and before entering the cabin, the whole body should be disinfected, hair and hair should be removed, and the whole body should be bathed, etc.; 2. Observation period: the patient will recover the function of right hematopoietic cells in about 20 days and can be transferred to the general ward and enter the observation period of about 1 year.