NOVELTY - Polyphenol is dissolved in water, filtered and eluted, to obtain epigallocatechin-3-gallate-rich fraction and epicatechin gallate-rich fraction. Epigallocatechin-3-gallate-rich fraction is subjected to column chromatography and eluted, to obtain epigallocatechin-3-gallate. Epicatechin gallate-rich fraction is subjected to column chromatography and eluted, to obtain epigallocatechin gallate. Epigallocatechin-3-gallate and epigallocatechin gallate are concentrated and lyophilized, to obtain epigallocatechin-3-gallate and epigallocatechin gallate with high purity.    USE - Preparation of epigallocatechin-3-gallate and epicatechin gallate (claimed).    ADVANTAGE - The method provides epigallocatechin-3-gallate and epicatechin gallate with high recovery rate and yield, by simple and economical process without using toxic solvent.    DETAILED DESCRIPTION - Polyphenol is dissolved in water and filtered, to obtain clear aqueous solution of polyphenol. The aqueous solution of polyphenol is introduced into weakly-polar macroporous adsorption resin and gradient elution is performed, to obtain epigallocatechin-3-gallate-rich fraction, epigallocatechin-3-gallate and epicatechin gallate-overlapped fraction and epicatechin gallate-rich fraction (II). The epigallocatechin-3-gallate-rich fraction is subjected to column chromatography (A) in which column is filled with agarose gel microsphere-bonded beta -cyclodextrin medium and eluted using 80% ethanol as mobile phase, to obtain more than 85% epigallocatechin-3-gallate having purity of more than 95%. The epicatechin gallate-rich fraction is subjected to column chromatography (B) in which column is filled with agarose gel microsphere-bonded beta -cyclodextrin medium and eluted using 80% ethanol as mobile phase, to obtain more than 80% epigallocatechin gallate having purity of more than 90%. The obtained epigallocatechin-3-gallate and epigallocatechin gallate are concentrated under reduced pressure, alcohol is added and lyophilized, to obtain epigallocatechin-3-gallate and epigallocatechin gallate with high purity. The epigallocatechin-3-gallate and epicatechin gallate-overlapped fraction is diluted by purified water, alcohol concentration in the resultant solution is detected to 10% or less and step (II) is performed.