Abstract:Objective: To analyze the chemical components of the essential oil of the Asarum from various habitats and provide scientific basis for its quality control. Method: The essential oil was extracted by water-steam distillation. The relative content of chemical components was identified by GC-MS method. Result: Three batches of A. from various habitats were determined and 18 common characteristic compounds were identified, mainly including the methyl eugenol, safrole, estragole, 3,5-dimethoxy-toluene, α-pinene, β-pinene, 3-carene, eucarvone, myristicin, and elemicin. Conclusion: The essential oils of A. from various habitats are different in the ratio and level of main components.