Abstract: In this paper, the extraction and microencapsulation technology of tea polyphenols were studied. Results showed:(1)The optimum conditions for tea polyphenols extraction from tea were as follows: extracting with 70% ethyl alcohol at room temperature 3 times and 1.0h each time. (2) The optimum conditions for tea polyphenols microencapsulation with chitosan-alginate sodium system were as follows: 3% alginate(alginate sodium/ tea polyphenols=5:1) 1% chitosan and 3% calcium chloride by one- step mothod to prepare the tea polyphenols’ microencapsule. In vitro release studies, results showed that the microcapsules could realizes ustainedrel easei nt he intestine.

Key words: Tea polyphenols, extraction, microencapsulation, preparation