Amniotic fluid embolism is a serious complication of obstetric hemorrhage, mainly because the amniotic fluid contains some meconium, fetal fat and fetal hair, which enter into the blood circulation of pregnant women and cause a series of abnormalities of coagulation function. Because the maternal patient is in a hypercoagulable state, these substances enter the blood circulation and promote blood hypercoagulation even more, consuming more coagulation factors after hypercoagulation, and less coagulation factors remain after consumption, which cannot achieve hemostasis, so the patient is prone to DIC also known as diffuse intravascular coagulation, which is prone to hemorrhage due to microvascular embolism and gathering a large amount of coagulation factors. In this kind of patients, sometimes no obvious vascular rupture is observed, and it is diffuse bleeding. On the operating table or during labor, the closer the puncture is, the more stitches are tied, so diffuse bleeding needs to be controlled by some other measures to control DIC and achieve hemostasis.