In this study, the volatile components in Australia mint were extracted, using supercritical CO₂ and subcritical butane, and then the extractives were analyzed by GC—MS. The results showed that the extraction rate of supercritical CO₂ was 2.5%, and that of the subcritical butane was 1.4%. Through the analysis of GC—MS, 21 components were identified in the supercritical CO₂ extraction, and the relative content of menthol was 70.33%. However, 11 components were identified in the subcritical butane extraction, and the relative content of menthol was 60.83%. Our results showed that the supercritical CO₂ extraction of volatile components in Australian mint was better than the subcritical butane one.