Objective: To study the foruier transform infrared(FT-IR) fingerprinting characteristics of Gegen Qinlian decoction and its active components alignments. Method: FT-IR was adopted to analyze and describe the characteristics by Gegen Qinlian decoction and the active components alignments. Result: The main characteristic peaks of Gegen Qinlian decoction are at 1 727

1 614

1 509

1 448

1 362

1 272

1 031

838

767

582 cm-1

etc.

and the crude drugs for decoction in Anhui region has the highest correlation coefficient with genuine medicinal materials. The FT-IR fingerprint characterization (1 800-400 cm-1) of the active components alignments for Gegen Qinlian decoction are 1 726

1 607

1 509

1 451

1 364

1 238

1 037

891

834

591 cm-1

etc. Conclusion: The FT-IR fingerprint identification method can be used for quality evaluation for Gegen Qinlian decoction

and reflect the main features. It has obvious specificity.