Objective To study the relationship between perioperative transfusion and postoperative infection.Methods 567 cases of perioperative transfusion from 1992 to 2007 were analysed.According to the blood components it was divided into whole blood transfusion group,frozen plasma group,and concentrated red cell group.The relation of the blood category and quantities with postoperative infection was analysed.The results were compared with non-transfusion group of 856 cases.Results The postoperative infection rate of whole blood transfusion group was 12.4%,the infection rate of frozen plasma transfusion was 7.3%,and that of red cell transfusion was 5.6%.There was significant difference among them(P0.05).Conclusion There is a close correlation between perioperative transfusion and postoperative infection.The infection rate by whole blood or plasma transfusion is high and by component transfusion is comparatively low.