TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The extraction method is reflux, ultrasound, permeating or soaking, preferably reflux extraction, the solvent used is 30-90% of alcohol, preferably 50-80% of alcohol. The mass ratio of the enzyme/paste in the step (ii) is 0.01-5, enzyme is added to process enzymolysis, preferably mass ratio of the enzyme/paste is 0.1-0.5, the reaction temperature is 15-70 degrees C, preferably 37-50 degrees C and the reaction time is 4-72 hours. The impurity is removed by ethanol precipitation in the step (iii) and the used alcohol is ethanol or methanol. The separation and purification method is a chromatograph purification method, and the chromatograph medium comprises macroporous resin, polyamide and silica gel. The model number of the used macroporous resin is D101, D201, HPD-100, HPD-200, AB-8, NK- 9, NK-11 or FL-1, preferably FL-1, HPD-100 and AB-8. The separation and purification method of the macroporous resin and polyamide includes: filtering the upper clear liquid or filtrate after hydrolysis by a macroporous absorptive resin column or a polyamide column until it is saturated at the flow speed of 2-4 fold column volume; the impurity is cleaned by pure water and 10% of ethanol until the effluent liquid becomes colorless and washed by 40% of ethanol until the taxifolin is totally washed; the ethanol solution and the effluent liquid are collected; the ethanol is recovered and the solvent is recovered and concentrated until solid is analyzed, and the solid is the taxifolin crude product. The separation and purification method of silica gel chromatograph includes: evaporating, agitating and packing the hydrolytic upper clear liquid or filtrate, totally washing the organic solvent by organic solvent elution or gradient elution until the taxifolin is washed totally, and recovering the solvent until solid is analyzed, where the solid is the taxifolin crude product. Preferred Components: The pH of the buffer liquid for enzymatic reaction in step (ii) is 3-6, preferably 4.5-5.5. The buffer liquid in the step (ii) is disodium hydrogen phosphate-citric acid buffer liquid, phosphate buffer liquid, acetic acid-sodium acetate buffer liquid, citric acid-sodium citrate buffer or citric acid-sodium hydroxide-hydrochloric acid buffer. The organic solvent for elution is petroleum ether, low carbon chain alkyl halide, low-carbon chain alcohol or low-carbon chain ester, low-carbon chain ketone, or mixture of two solvents. The low-carbon chain alkyl halide comprises halomethane, halogenated ethane e.g. chloroform, dichloromethane, dibromoethane and tribromoethane. The low-carbon chain alcohol is 1-3C alcohol e.g. methanol, ethanol, propyl alcohol or isopropanol. The low-carbon chain ester is 1-5C ester e.g. methyl formate, ethyl formate, methyl acetate and ethyl acetate. The low-carbon chain ketone is 1-5C ketone e.g. acetone and butanone. The recrystallized solvent is mixed solvent of ethanol, methanol, acetone and water. The enzyme is beta -glycosidase, cellulase, helicase, naringinase and/or pectinase, preferably glycosidase and cellulose. ACTIVITY - Hepatotropic.