Principles include coagulation and vasoconstriction, as well as physical and physiological principles, such as Platycladus orientalis and imperata rhizome. Their principle is physiological, and some bleeding is caused by blood heat, which has the effect of cooling blood, so that there is a balance to stop bleeding. The principle of action of panax notoginseng is related to the liver and should also belong to physiology. Bletilla striata, its hemostatic principle should be physical, which is related to its colloidal composition. The wound can form a protective film and coagulate with red blood cells to form a thrombus, thus achieving the purpose of hemostasis. The principle of action of Sophora japonica is to reduce the permeability of blood vessels. The principle of action of Pollen Typhae, Herba et Gemma Agrimoniae, crinis Carbonisatus, Folium Artemisiae Argyi, Sanguisorba officinalis and Palm is coagulation.