The present invention relates to a producing method of a tea catechin mixed extract containing high purity epigallocatechin gallate (EGCG) of a structural formula extracted from green tea leaves and, more specifically, to a method for extracting and purifying tea catechin, comprising: a step of extracting tea catechin by heating green tea leaves in boiling water a step of dissolving the extract in hot water and quenching the extract after concentrating the extract, and conducting extraction and concentration of the extract in an organic phase using an organic solvent, and thus precipitating and filtering a catechin-caffeine complex including EGCG and a step of separating the catechin-caffeine complex using an ethanol solution as an eluant by a column.COPYRIGHT KIPO 2016본 발명은 녹차잎으로부터 하기의 구조식의 EGCG(Epigallocatechin gallate)를 고순도로 함유하는 차카테킨 혼합추출물의 제조방법에 관한 것이다.
