Bone marrow transplantation platelets do not rise, first of all, to exclude the factors of infection and rejection, after bone marrow transplantation, the reconstruction of the autoimmune system needs two to three years, from the date of bone marrow transplantation, platelet rebound time is generally more than 4 weeks, and clinical data show that the majority of patients platelet recovery is delayed until 180 days after transplantation. 1. Bone marrow transplant patients should pay close attention to the body’s immune rejection reaction and beware of infection after transplantation, and continue to receive chemotherapy, and do genetic examination after six months, and only when the bone marrow, blood and important organs are normal, the transplantation is considered successful. 2. In addition, in the stage of hematopoietic reconstruction, the recovery of one or more blood cells is relatively slow, if platelets still do not rise, the use of human thrombopoietin, eltrombopoietin and other drugs to raise platelets, as appropriate, treatment. It is recommended that patients go to the hospital in a timely manner, under the guidance of the physician treatment, in order to avoid delaying the condition.