Abstract:The Elsholtiza bodinieri Vaniot essential oil was extracted from Elsholtiza bodinieri Vaniot by solvent-free microwave extraction .The effects of material liquid ratio，soaking time，extraction time and microwave power on the yield of Elsholtiza bodinieri Vaniot essential oil were tested and studied.Based the obtained single factor experiment data and by using orthogonal test method，the solvent-free microwave extraction process for the Elsholtiza bodinieri Vaniot essential oil was optimized.Gas chromatography-mass spectrometry（GC-MS）was used to analyze the chemical constituents of the essential oil.The results indicated that the optimum extraction condition was that：material liquid ratio 1 ∶6（volume ratio），soaking time 2 h，ex－traction time 60 min，microwave power 600 W，the yield of Elsholtiza bodinieri Vaniot essential oil was 0.096 mL/50 g.The chemical components were analyzed by GC-MS，and 43 peaks were separated and identified.The test results showed that the main component of the essential oil of Elsholtiza bodinieri Vaniot was terpinyl acetate，and its relative content was 56.25 %，followed by geranyl propionate（6.8 %），palmitic acid（4.95%），paracetamol（4.83%），caryophyllene oxide（4.41%），ccetic acid（Z）-5-lanolin alcohol（3.28%），alpha-terpineol （2.91 %），（S）-（+）-5-（1-hydroxy-1-methylethyl）-2-methyl-cyclohexene-1 ketone（1.18 %），terpineol（1.14%）and trimethyl（1.1%）。