Abstract: There has been hundreds of years since 1818 when Blundell transfused blood to a parturient who was suffering severe bleeding and 1900 when an Austrian pathologist Karl Landsteiner found RBC ABO, the first human blood group system. As one of the life energy materials, blood plays an irreplaceable role in clinical treatment and rescue. Featuring small capacity preparations, high concentration and purity, good curative effect, safe application, less adverse reactions, easy to usage and save, saving blood resources, reducing the occurrence of transfusion transmitted diseases and so on, blood components have been widely used in the clinic. Because bleeding onset abrupt, diseases change quickly and serious complications in obstetrics and gynecology, transfusion therapy has become a necessary mean in postpartum hemorrhage and disseminated intravascular coagulation in order to save the lives of the mother and baby. It should be noted that in the course of blood component transfusion, it is the key of ensuring the safety and the effectiveness of blood transfusion to master the characteristics of various blood components and operate in a scientific and reasonable way.

Key words: Blood component transfusion, Blood component preparation, Disseminated intravascular coagulation, Postpartum hemorrhage