The process of platelet transfusion is to check the blood type and other tests before transfusion, grasp the indications, and gently shake the blood bag, etc.; the precautions are to inform the condition, the speed of transfusion, and antisensitization treatment. 1. The process of platelet transfusion is: before transfusion, it is necessary to check the cross-matching, test the blood type, evaluate the liver function, infection program and so on. It is also necessary to grasp the indications for blood transfusion to avoid danger. Before platelet transfusion, the blood bag should be gently shaken so that the platelets and plasma are fully mixed. Platelet transfusion should use a Y-shaped blood transfusion device, the speed of the first slow and then fast, the back should be the fastest speed that the patient can tolerate the transfusion, generally is needed in 4 hours to complete the platelet transfusion. At the same time need to pay attention to observe whether the patient has adverse reactions. 2. Precautions for platelet transfusion: before platelet transfusion, patients should be informed of the necessity of platelet transfusion and the related risks, and patients or their families should be asked to sign an informed consent form. When transfusing platelets, it is necessary to follow the principle of first slow and then fast, and at the same time, observe whether the patient has any adverse reaction, if there is no adverse reaction, then it can be transfused according to the normal speed. After platelet transfusion, some patients may have allergic symptoms such as skin itching, and should be treated with targeted therapy such as oral isoprinosine hydrochloride in a timely manner. The specific process and drug treatment should be carried out under the guidance and monitoring of physicians.