Objective:To establish the method of fingerprint analysis on Yinqiao Chaigui Decoction

work out the characteristic fingerprint

and study the influence of various compatibilities on fingerprint peaks.Method:HPLC with Hypersil ODS was used

methanol-water（gradient elution）as a mobile phase and detection wavelength at 230 nm

flow rate was 1 mL·min-1

and column temperature was 35 ℃.Result:Seventeen common peaks were separated in 10 batches of Yinqiao Chaigui Decoction.A little influence on characteristic peaks was found in various compatibilities

but there was no new characteristic peak.The characteristic peaks were the summation

peak 2（chlorogenic acid）

3

4

6

7 were from Lonicera japonica

peak14（baicalin）

15

16

17 were from Scutellaria baicalersis;peak 5（paeoniflorin） was from Paeonia lactiflora Pall;peak 11

12 were from Cinnamomum cassia presl and peak 1

11 were from Forsythia suspense.Conclusion:The method is reliable

accurate and provides a reference for the rules of the compatibility and material base of Yinqiao Chaigui Decoction.