NOVELTY - Extraction of high-purity resveratrol comprises naturally drying grape seed, crushing to 3-60 meshes, adding ethyl acetate, shaking uniformly, standing and layering, removing water phase, adding in distilled water for 2 times to remove water-insoluble impurity to obtain ethyl acetate, vacuum concentrating to obtain paste at 40-60 degrees C, washing resveratrol crude product by ethanol with volume concentration of 20-40%, filtering; and collecting eluent A after drying to constant weight at 40-60 degrees C to obtain purity of 35-59% resveratrol at 70 degrees C with volume concentration 90% 2.5 times.    USE - Method of extraction of high-purity resveratrol (claimed).    ADVANTAGE - The method has cost, is simple, has low environment pollution and is suitable for industrial production.    DETAILED DESCRIPTION - Extraction of high-purity resveratrol comprises:    (A) naturally drying grape seed, crushing to 3-60 meshes, mixing with ethyl acetate, obtaining solid-liquid mixture, vacuum filtering to obtain filtrate A, concentrating to obtain paste, adding deionized water and petroleum ether, shaking uniformly and standing to divide into layers, removing petroleum ether phase, adding petroleum ether, repeatedly extracting for 3-6 times to remove grease to obtain oil water phase;    (B) adding ethyl acetate, shaking uniformly, standing and layering, removing water phase, adding in distilled water for 2 times to remove water-insoluble impurity to obtain ethyl acetate, vacuum concentrating to obtain paste at 40-60 degrees C, washing resveratrol crude product by ethanol with volume concentration of 20-40%, filtering, and obtaining filtrate B; and    (C) at 200-500C degrees C, naturally cooling filtrate B to room temperature, passing filtrate B at flow rate of 2-4 BV/hour in HPD-100 macroporous resin column, with sample size of 40-50 times of HPD-100 macroporous resin column I the total volume of saturated in collecting the sample effluent liquid, washing column with distilled water, discarding washing solution, collecting eluent A after drying to constant weight at 40-60 degrees C to obtain purity of 35-59% resveratrol at 70 degrees C with volume concentration 90% 2.5 times to elute HPD-100 macroporous resin column II, collecting eluent B, and drying to constant weight at 40-60 degrees C to obtain 70-98% resveratrol.