Abstract: The chemical constituents of the essential oil of Henan Aristolochia Mol-lissima were analysed by CC/MS. 18 compounds, i. e. α-pinene, camphene,β-pinene, 1, 8-cineole, camphenilone camphor, borneol, bornyl formate, bor-nyl acetate, terpinyl acetate, cis-1-carvyl acetate, δ-elemene, β-elemene,β-cargophyllene, β-mauliele, α-gurjunele, gurjunele, γ-elemene, have beenidentified. The experimental results have also been discussed.