Abstract: In this study,the Fourier transform infrared spectroscopy was used to analyze the Cynomorium songaricum of different populations from Qinghai province.The IR fingerprint Spectra of C.songaricum was established through the identification of common peaks and the analysis of similarity,and 13 common peaks were confirmed.The cluster analysis result showed that the samples of Qinghai province were mainly divided into two groups.The one is the Qaidam basin population,and the other is mainly Gonghe basin population.The result indicated that its quality may be related to the geographical distribution.This study provided the theoretical basis for the characterization and quality analysis of C.songaricum of Qinghai.

Key words: Cynomorium songaricum Rupr., IR fingerprint spectra, common peaks, similarity analysis, cluster analysis