The human blood coagulation pathway, there are two types of exogenous coagulation pathway and endogenous coagulation pathway, and their coagulation process also has obvious differences, in which, the exogenous coagulation pathway firstly, the blood contacted the human tissue factor, then activated factor 7, then activated factor 10, then activated factor 2, which is prothrombinogen, and finally activated fibrinogen, and fibrinogen can be broken down to have active fibrin, and finally form a fibrin clot, thus achieving coagulation. The endogenous clotting pathway first activates clotting factor 12, then clotting factor 11, then clotting factor 9 and 8, and finally clotting factor 10, and the latter pathway is exactly the same as the exogenous clotting pathway. So human blood clotting is achieved through the exogenous clotting pathway and the endogenous clotting pathway.