Clinically, platelets below 300×10^9/L are called thrombocytopenia. Thrombocytopenia requires the following treatments: i. Basic treatment, including the cessation of drugs that should affect platelet function, such as aspirin, indomethacin and other non-steroidal anti-inflammatory and analgesic drugs, but also the application of hemostatic drugs, compression bandages, etc. Second, conventional treatment, including platelet transfusion, application of TPO, interleukin-11, TPO receptor agonists: Romistatin, Etriopopap, etc. Third, prophylactic treatment, such as application of TPO and interleukin-11 within 6-24 hours after the end of chemotherapy. fourth, etiological treatment, such as aplastic anemia, application of androgen therapy. Primary thrombocytopenia, apply adrenocorticotropic hormone, gammaglobulin, plasma exchange, etc. Megaloblastic anemia, apply vitamin B12 treatment. V. In the case of poor results of the above treatments, splenectomy can be applied under.