Abstract:Objective: To establish a quantitative method of simultaneously determination of swertiamarin, gentiopicroside,mangiferin, swertianolin, isoorientin, 1,8-drihydroxy-3-methoxy-xthanone in Swertia from Qinghai province and Sichuan province by HPLC. Method: The samples were separated on the column of Kromasil C18(4.6 mm×250 mm,5 μm) which eluted with methanol and water(content 0.02% phosphoric acid).The ratio of methanol increased from 20% to 80% during 20-50 min,and from 80% to 100% during 50-60 min, with detected wavelength 254 nm,flow rate at 1 mL·min-1,column temperature 35 ℃. Result: Six compounds were base-isolated,the linear ranges of swertiamarin, gentiopicroside, mangiferin,4-swertianolin, 5-isoorientin,1,8-drihydroxy-3-methoxy-xthanone were excellent. Conclusion: The method was rapid and precise,and can be use for controlling medicinal materials quality.