Abstract:In order to know Pu'er sun-dried black tea and provide the theoretical basis of scientific for Pu'er sun -dried black tea research. The main quality chemical compositions of Pu'er sun -dried black teas were analyzed and evaluated nutrition value of amino acids and mineral elements in teas. The results showed that the average contents of total free amino acid， theanine， water extract， caffeine， tea polyphenols （TP）， theaflavin （TF）， thearubigins （TR） and theabrownine （TB） were 2.6 %， 0.47 %， 36.8 %， 3.4 %， 0.09 % and 2.43 % respectively， and their variable coefficients were less than 15 %， among them， the total catechin content was 0.46 %， and the average ration of ester-catechin contents to total catechins content was 78.5 %. All tea samples included 17 amino acids； the total amount of amino acids were 8.016 %， among them， the content of essential amino acids， taste amino acids and medicinal amino acids were 2.071 %， 3.922 % and 5.216 % respectively， and the SRC was 46.66. The content of 8 mineral elements in tea samples were K＞Ca＞Mg＞Mn＞Fe＞Na＞Zn＞Cu， the INQ values of all mineral elements were exceeded 1， but the INQ of Na was less than 1.