Abstract: The content of main active components in Forsythia suspensa leaves and flowers from different regions were determined,and the quality difference in samples was analyzed,which provided a scientific basis for the resource development and comprehensive utilization of F. suspensa leaves and flowers.The contents including rutin,hyperoside,forsythiaside A,forsythin,oleanolic acid and ursolic acid in 28 batches of F. suspensa  leaves and flowers were determined by liquid chromatography mass spectrometry (LC-MS) technology,the results were analyzed by principal component analysis (PCA).The results showed there were some differences in the main active components in F. suspensa  leaves and flowers from different regions.PCA showed the comprehensive evaluation of F. suspensa  leaves in Shanxi Linfen,Shaanxi Xi'an and Henan Xinyang were better,and the comprehensive evaluation of F. suspensa  flowers in Henan Luanchuan,Shandong Pingyi and Shandong Rizhao were better.The method of good precision,repeatability and stability showed certain reference to the comprehensive utilization and the development of resource products of F. suspensa  leaves and F. suspensa flowers.

Key words: Forsythia suspensa leaves, Forsythia suspensa flowers;liquid chromatography mass spectrometry (LC-MS);active components;principal component analysis