In this study， 16 kinds of teas with good sales were selected as the representative， the contents of total phenols， total flavonoids， amino acid nitrogen， reducing sugar and total sugar in different tea samples were compared， and ascorbic acid was used as the positive control， scavenging activity against DPPH radical， scavenging activity against ABTS radical， reducing power and metal ion chelating activity were used to evaluate the antioxidant activity of different tea samples； in addition， correlation analysis， cluster analysis and principal component analysis were used to reveal the complex relationship between antioxidant substances and antioxidant activities of 16 kinds of tea samples. The results showed that there were significant differences in the contents of antioxidant substances and antioxidant activities among different tea samples except a few tea samples， the scavenging activity against DPPH radical of the Buxus jintan tea and Golden sprout tea were the strongest， the scavenging activity against ABTS radical of West Lake Longjing tea was the strongest， the reducing power of Golden sprout tea was the strongest， the metal ion chelating activity of Nanjing Huanglongxian tea was the strongest. Golden sprout tea， Nanjing Huanglongxian tea， Buxus jintan tea， West Lake Longjing tea and Xinyang Maojian tea had higher comprehensive scores. In this study， the antioxidant activities and antioxidant substance of commercially available teas were evaluated comprehensively， which can lay data foundation for the study of antioxidant mechanism of teas and provide reference for consumers to select tea.