NOVELTY - Method for extracting isoquercitrin, fenoxaprop-ethyl, and polysaccharide, involves crushing balm root stem, drying the crushed root, separating the mixture by subjecting the mixture to primary separation kettle, subjecting the separated mixture to secondary separation kettle, adding 40-70% ethanol as entrainer, performing the dynamic process for 4-8 hours, obtaining solid extracts from the kettle, vacuum freeze-drying the mixture to obtain isoquercitrin, and repeating the above-mentioned process to obtain fenoxaprop-ethyl and polysaccharide.    USE - The method is useful for extracting isoquercitrin, fenoxaprop-ethyl, and polysaccharide for stopping bleeding, reducing blood pressure, resisting inflammation, inhibiting virus, relieving cough, inhibiting tumors and lung cancer, and enhancing immunity.    ADVANTAGE - The method is simple, convenient to operate, and environmentally-friendly.    DETAILED DESCRIPTION - Method for extracting isoquercitrin, fenoxaprop-ethyl, and polysaccharide, involves crushing balm root stem, drying the crushed root, granulating the crushed root to mesh size of 60-100, drying the root to 55-65 degrees C for 6-10 hours, subjecting the dried root to supercritical carbon dioxide extraction at 34-40 MPa and 30-38 degrees C, separating the mixture by subjecting the mixture to primary separation kettle, maintaining pressure and temperature at 13-17 MPa and 30-40 degrees C, respectively, subjecting the separated mixture to secondary separation kettle, maintaining pressure and temperature at 4MPa and 30-40 degrees C, respectively, adding 40-70% ethanol as entrainer, performing the dynamic process for 4-8 hours, obtaining solid extracts from the kettle, vacuum freeze-drying the mixture to obtain isoquercitrin, removing waste slag in the mixture, adding 6-10 times 30-60% ethanol to the slag in the mixture at room temperature, circulating the mixture for 3-5 times, combining the extracts, passing the extracts in macroporous resin column, absorbing the extracts, eluting the extract using mixture of ethanol and methylene dichloride, mixing ethanol and methylene dichloride in a ratio of 1/1/2 at speed of 1-3 times, concentrating the eluent, vacuum freeze-drying the eluent, drying to obtain fenoxaprop-ethyl, subjecting the remaining mixture to nonpolar macro-porous resin, decoloring and filtering the mixture, concentrating the filtrate, removing protein, vacuum freeze-drying the mixture to obtain polysaccharide.