Abstract:Lu'an Guapian is one of the top ten famous tea in China and a special variety of green tea.By analyzing the the correlation between the astringency value and the content of tea polyphenols of Lu'an Guapian tea soup in different brewing conditions，the change rule of astringency value and conten of tea polyphenols could be further grasped，it provided the theoretical basis for the scientific brewing of Lu'an Guapian tea soup.The astringency value and the content of tea polyphenols of tea soup were measured by electronic tongue and high performance liquid chromatography equipment.The data were analyzed the significance and the correlation.The results showed that the influence of different brewing conditions on astringency value：brewing water quality ＞brewing water temperature ＞brewing time，in which the influence of brewing water quality and brewing water temperature on astringency value was extremely significant and the influence of brewing time on astringency value was significant.The effect of different brewing conditions on the content of polyphenols：brewing water temperature ＞brewing water quality ＞brewing time，in which the influence of brewing water temperature on the content of tea polyphenols was significant.The content of tea polyphenols and astringency value had a significant positive correlation（p＜0.01）.