In order to explore the comprehensive evaluation methods and key evaluation indexes of tea resources,and screen tea resources with excellent functions,45 tea resources from different regions of Jiangxi Province and introduced and domesticated outside were used as materials,14 main functional component indexes were determined,and the key indexes were screened by correlation analysis and principal component analysis,and comprehensive evaluation was conducted. The results showed that the main functional components of tea resources in Jiangxi Province were quite different,through correlation analysis and principal component analysis,5 principal component factors and 8 key evaluation indexes were selected,and finally a comprehensive evaluation index model of tea resources was established.According to the comprehensive evaluation model,45 tea resources could be divided into four levels,among which the comprehensive evaluation index>7.0 was the best one,including 5 varieties,successively Fuliangzhuye,Yanbeinao 2,Jiangcha 15,Huangjincha and Fuliangguangming 2.At the same time,the principal component analysis can be used as a new method for the comprehensive evaluation of tea functional components.