It is not the cause of hemolytic reaction during blood transfusion, and it is too fast. According to relevant public information, hemolysis during blood transfusion is the most serious complication of blood transfusion. The common reason is the transfusion of ABO blood group incompatible blood. After 10 to 20 ml allogeneic blood transfusion, the patient developed symptoms such as headache, chest pain, chills, high fever, back pain and hemoglobinuria. Severe cases cause acute renal failure and even death. There are a few reasons for hemolytic reaction, such as improper blood treatment before blood transfusion, such as long storage time or violent vibration of blood, which leads to hemolytic reaction.