Abstract:Ziziphus Jujuba cv.Junzao was taken as a raw material in this study，and its essential oil was extracted using the supercritical CO2extraction technology.The extraction process of jujube essential oil was optimized by single factor and orthogonal experiments.Finally，the components of jujube essential oil were analyzed using the technology of headspace solid phase microextraction （HS-SPME）combined with gas chromatography-mass spectrometry （GC-MS）.The results showed that the optimum process parameters for supercritical carbon dioxide extraction of jujube essential oil are ethanol as a carrier，pressure 25 MPa，temperature 32℃，entrained flow rate 0.3 mL/min，and extraction time 3 h.The extraction rate of jujube essential oil was 1.224%.A total of 68 components were detected by GC-MS，59 structural inferences，accounting for 91.737%of the total peak area，which were classified by acids，alkanes，ketones，esters，aldehydes and alcohols.Among them，caramel-scented maltitol and 5-methyl furfural，almond-odour benzoic acid and furfural，and milky-scented 3-hydroxy-2-butanone might be the main aroma components of the jujube essential oil.