Abstract: The method for abstracting tea polyphenols(TP) from tea leaves by using macroporous resins was studied in this paper. The optimal operation conditions of infrusion were found by orthogonal experiment with decoloring and decaffeinating crude extract by regulating pH value, loading it onto a column containing an adsorbent macopore resin NKA -2, for specifically absorbing TP, desorbingTPwith80% ethyl alcohol and extracting said solvent with EtAc 2 time. We obtained the high purity TP product. The purity reached 94. 72% and the yield was 13.65%.

Key words: Aea polyphnols , Aadsorption resin