Abstract: Pinus sinensis is a widely distributed Chinese endemic species, with a long application history in Chinese herbal medicine. Polyphenols and tannins are important medicinal components in pines. In this paper, Folin-Cicalten method and the Chinese national standard determination method of tannins were adopted to determine the total polyphenols and tannins contents in root, stem and leaf of P.sinensis. The total contents of polyphenols in root, stem and leaf of pine was 89.24±12.06, 68.18±11.20 and 104.30±12.51 mg·g^-1, respectively, and tannin contents were 25.38±5.85, 20.92±3.55 and 39.02±5.68 mg·g^-1, respectively. The results showed leaf contained the highest content of total polyphenols, while stem the lowest. Compared with other medicinal plants, the relatively high contents of total polyphenols and tannins make P.sinensis a promising treasure in development and application.

Key words: Chinese pine, total polyphenols, tannins, Qinghai, development and application