Long cells after stem cell transplantation for remyelination, also known as the re-establishment of hematopoietic function, clinical studies have shown that hematopoiesis is generally restored 14 to 28 days after stem cell infusion. The specific length of time should be based on the type of stem cells, the effect of transplantation, the patient’s physical condition, later treatment and other circumstances. Studies have shown that after bone marrow hematopoietic stem cell transplantation, the time of hematopoiesis varies due to different types of stem cells. If the number of CD34+ stem cells in the graft increases, the hematopoietic reconstruction will be faster, and the patient’s physical condition is better, no complications such as infection and graft-versus-host disease occur, and the faster the hematopoietic reconstruction will be after transplantation. In addition, granulopoiesis recovery is faster than platelet index recovery. The above time is for reference only, the exact length of time varies from person to person. Patients are advised to have regular medical checkups, and if any abnormality is found, regular treatment should be carried out under the guidance of physicians as soon as possible.