Abstract: Linalool oxide,linalool,β-ionone,dihydro-β-ionone, α-ionone,geraniol,ocimene,etc.were examined by dynamic headspace collection and TCT-GC/MS analysis from 4 Osmanthus fragrance cultivars in Hangzhou Manlong Guiyu Park,comparing with the surrounding air(CK).The results of comparing the volatile compounds in this 4 cultivars showed that there were some differences not only in their relative contents but also in the component's content.There are more content of linalool and ionone in Osmanthus fragrans'Fo Ding Zhu',but no geraniol can be detected.Osmanthus fragrans'Yu Linglong'contains more ionone and cis-linalool oxide.More linalool,ocimene and ionone were detected in Osmanthus fragrans'Xiaoye Jin'.Osmanthus fragrans'Zhusha Dan'contains more content of linalool,linalool oxide and trans-geraniol.