Generally 1 unit of plasma will be transfused within 20-30 minutes, 1 unit of plasma means 100ml, but sometimes in statistics 100ml is converted into 1 unit, the first 15 minutes of transfusion 2-5ml/min, after 15 minutes if the patient has no adverse transfusion reaction, the appropriate increase in transfusion rate, basically then in about 5ml/min. It is generally believed that plasma is basically transfused within half an hour, and it is not strict to stipulate that a packet of plasma must be transfused within half an hour in a clinical setting. The plasma package size varies greatly, sometimes the plasma is 120ml, sometimes it is 240ml, the infusion time should be different, firstly, the infusion speed should be specified, basically, to ensure that the regular dose is about 200ml, basically it can be finished in 30 minutes. 15 minutes later, the infusion speed can be appropriately accelerated, if the patient has no transfusion reaction, no other conditions, the patient can tolerate the situation with the fastest speed. The transfusion speed should be decided according to the individual differences of the patient.