NOVELTY - Method for extracting active component from natural plant, involves crushing safflower into powder, performing cold extraction, mixing extracts, concentrating the extract, purifying the concentrate by macroporous resin, eluting the component using water, ethanol or acetone, collecting eluent and drying the eluent, subjecting the powder to column chromatography, performing gradient elution using water, ethanol or acetone, detecting the eluent by thin layer chromatography, and separating the eluent to obtain product in the form of white powder.    USE - The method is useful for extracting active component, preferably 5,7-dihydroxy-8-(3,4,5-trihydroxy-6-hydroxymethyl-tetrahydropyran-2-yl)-chromen-4-one from natural plants, where the component has antibacterial and antioxidant effect ( all claimed).    ADVANTAGE - The method is simple, cost-effective and environmentally-friendly and produces high yield of active component. The extraction rate of the active compound is 1.1% and has purity of 96% or more.    DETAILED DESCRIPTION - Method for extracting active component from natural plant, involves (a) drying safflower and crushing the dried safflower into coarse powder, (b) cold extracting the dried safflower (50 wt.%) (thrice) using 80% ethanol for 12-20 hours each time and mixing the extracts, (c) concentrating the extract at 60-70 degrees C under vacuum to obtain concentrated liquid containing 0.5-1 g/ml of concentrated medicinal material, (d) extracting the obtained concentrated solution using water, ethyl acetate or n-butyl alcohol in a volume ratio of 1:1-3 for 3-5 times and concentrating the extracts at 60-70 degrees C to obtain concentrated solution, (e) purifying the concentrated solution using macroporous resin with butanol, separating and enriching macroporous adsorption resin Diaion HP-20 (RTM: High porous styrenic adsorbent resins), performing gradient elution of concentrated solution using water, ethanol (10-70%) or acetone (70%), collecting the eluent (3 times) under vacuum conditions at 60-70 degrees C or less and concentrating and drying the eluent to obtain powder, (f) subjecting the powder to column chromatography separation and purification using ethanol (50%) or water, passing the obtained eluent through Sephadex LH-20 (RTM: Liquid chromatography) or MCI-gel (RTM: Series of polymeric columns) using water, ethanol (10%, 20%, 40% or 60%) to carry out gradient elution, and eluting using acetone (70%), detecting the eluent by thin layer chromatography (TLC) and separating the eluent to obtain new component in the form of white powder.