Abstract:To analyze the chemical constituent of the extracts from Dendranthelna indicum by different extraction methods.The compounds were extracted by steam distillation and supercritical-CO2fluid extraction.Constituents were separated and identified by headspace extraction-gas chromatography-mass spectrometry（HS-GC/MS），and were quantified by the accuracy of area percent.161 components were separated among which 56 were identified，the main components were alpha.-Phellandrene（10.70%），Tetrahydro-2，2，6-trimethyl-6-vinyl-3--pyranone（7.14%），Linalool（11.90%），Linalool Oxide（7.95%）by steam distillation.121 components were separated among which 38 were identified，the main components were alpha.-Phellandrene（11.91%），o-Cymene（22.59%），Linalool（6.95%），Linalool Oxide（5.75%）in the supercritical-CO2fluid extraction.27 chemical components of the extracts were the same by the two extraction methods，but there are more than 18 components in the steam distillation.