Abstract: OBJECTIVE To explore the components of volatile oil from flowers of Syringa reticulate, and reveal its use and research value to make better protection and utilization of Syringa reticulata resources on Changbai Mountain. METHODS The volatile oil of Syringa reticulata was extracted by supercritical CO₂ extraction technology, and the components of the oil were qualitatively by GC-MS and relative content of each component was determined by area normalization method. Results The 45 chemical components were separated by GC-MS, which were 97.84% of the total oil, and 39 compounds of them were also identified. The main ingredients were: 1,3,5-cycloheptatriene(17.16%), 2-(phenylmethoxy)-, methyl ester (17.27%), benzenepropanol, 4-hydroxy-.alpha.-methyl-, (R)- (11.74%), phenylethyl alcohol (6.86%). CONCLUSION This method，using supercritical CO2 extraction Syringa reticulate volatile oil and analysis by GC-MS, is characterized by efficient and rapid as well as avoiding residual solvent. The experiment provides a theoretic basis for Syringa reticulate exploitation.