Leukemia relapse platelets of 7 × 10⁹/L are immediately hospitalized for platelet-boosting therapy and platelet transfusion. Follow-up chemotherapy or combination therapy generally requires platelets of 50×10⁹/L or more to be allowed. 1. Platelets 7×10⁹/L suggests critical condition, high risk of spontaneous intracranial hemorrhage, which can be life-threatening, and suggests urgent platelet transfusion treatment. Absolute bed rest, soft diet, and combined recombinant TPO and IL-11 treatment are required until platelets return to normal level or rise 50×10⁹/L compared with the pre-treatment level. 2. When the platelet index is higher than before, it can be treated against the etiology of leukemia relapse, such as giving decitabine, cytarabine, and Zoerythromycin and other drugs for re-induction chemotherapy. Platelets below 20×10⁹/L are recommended to be hospitalized to assess the risk of bleeding, observe whether there is active bleeding of the skin, mucous membranes and organs, and be treated with platelet-boosting therapy, with regular rechecks of routine blood tests. It is recommended that the patient go to the hospital in time, and the treatment should be carried out under the guidance of the physician.