Disseminated intravascular coagulation (DIC) is not an independent disease, but an intermediate pathogenesis or complication of certain clinically diagnosed diseases, characterized by extensive intravascular coagulation and bleeding tendency. DIC refers to a pathological process in which coagulation factors and platelets are activated under the action of certain pathogenic factors, a large amount of coagulation substances enter the blood circulation, causing intravascular microthrombosis, and concurrent or secondary hyperfibrinolysis, resulting in organ dysfunction, bleeding, anemia and even shock. The main feature is coagulation dysfunction. Its clinical characteristics are variable, and laboratory diagnostic methods are not uniform. There is no definite treatment plan at present, and some conventional treatment methods, such as the use of heparin, have not been rigorously scientifically demonstrated. It was previously called consumptive coagulation. In fact, the components consumed in the DIC process are not common. DIC can be complicated by different diseases throughout the pregnancy process, especially in the third trimester and during delivery. It is a serious complication that seriously affects the life of pregnant women.