Preparation method of absorbable degradatable starch hemostatic material

The invention relates to an absorbable degradatable starch hemostatic material. Involved starch is modified starch and includes one or more of carboxymethyl starch and hydroxypropyl starch. The starch hemostatic material includes one or more forms of hemostatic micro-particles, a hemostatic membrane and a hemostatic sponge. The preparation method includes processes of inactivating and devirusing, and the purposes comprise that the prepared hemostatic material is safe and effective and has an excellent hemostatic effect and generates no heat source reaction in clinical application. The preparation method also includes a granulating process of the hemostatic particles and a vacuum freeze-drying process of other forms of hemostatic materials. The prepared hemostatic material has excellent biocompatibility, can be absorbed and degraded in vivo, is non-toxic, has no stimulation, has flexible forms, can be directly used in various complicated bloody wound surfaces, absorbs moisture in blood, aggregates coagulation factors, platelets, fibrous protein sources and red corpuscles in the blood to the wound surfaces, and plays roles in closing hemostasis, preventing tissue adhesion and promoting tissue healing.