Heparin sodium is a sulfated substance of acid mucopolysaccharide produced by mast cells of connective tissue of animals. Because of its strong anticoagulant effect, it is the drug of choice for the prevention and treatment of thromboembolic diseases such as deep vein thrombosis. In-depth, it has been found that heparin sodium not only has anticoagulant, antithrombotic and blood lipid regulating effects, but also various anti-inflammatory, anti-allergic, anti-viral, anti-cancer and other biological functions.