研究表明，茶叶在10倍水量95℃浸提45min后，粗多酚的提取率可达80％左右；粗提所得茶水经理论级数5．35级连续逆流萃取后，可得到95％以上的茶多酚精制品；设计条件下的茶水相及乙酸乙酯相体积流量分别为57．1L／h和53．7L／h。 The results showed that the extraction rate of crude polyphenols could reach about 80% when the tea leaf was leached with 10 times of water at 95 ℃ for 45 minutes. The crude tea extract obtained by sequential countercurrent extraction with theoretical grade number of 5.35 was more than 95% Tea polyphenols refined products; Under the conditions of design, the volume flow of tea phase and ethyl acetate phase were 57.1L / h and 53.7L / h, respectively.