The aim is to develop a method for the content determination of tauroursodeoxycholic acid(TUDCA), taurochenodeoxycholic acid(TCDCA), ursodeoxycholic acid(UDCA), chenodeoxycholic acid(CDCA) and tauro-7-keto lithocholic acid(T-7-KLCA)in biotransformed samples.HPLC method was adopted and ELSD was used as detector.The determination was performed on Agilent XBD-C18 column with mobile phase of 0.05% TFA-acetonitrile(gradient elution) at the flow rate of 1.0 mL/min.The drift tube temperature was set at 80°C, and N2 flow was 3.0 mL/min.The column temperature was 40°C.The linear ranges of TUDCA, TCDCA, UDCA, CDCA and T-7-KLCA were 10.00-200.08, 10.22-204.32, 10.00-199.92, 9.85-197.08, 10.25-204.92 μg/mL(r=0.999 5-0.999 8), resp.RSDs of precision, stability and reproducibility tests were all lower than 2.0%.The average recoveries of 5 components were 97.9%(RSD=0.49%, n=3), 98.4%(RSD=0.63%, n=3), 97.9%(RSD=0.81%, n=3), 98.1%(RSD=0.72%, n=3) and 98.3%(RSD=0.78%, n=3), resp.The method was rapid, accurate and repeatable, which could be used for the quant. determination of 5 components in biotransformed samples.