The volatile components from Herba pleurospermi lindleyani were analyzed by capillary GC-MS method. The relative contents in the essential oil were determined by area noma lization. 73 compounds were identified in the oil. The main constituents are: 1-propoxy-2-propanol; Myristicine; 1, 2, 3-trimethoxy-5-(2-propenyl)-benzene; cis-Asarone; n-Hexane; Apiol; Dimethyl ether; 1, 2-dimethoxy-4-(2-propenyl)-benzene; Acetic acid, ethyl ester; Spathulenol; alpha, alpha, 4-trimethyl-benzenemethanol; Trans-methyl iso-eugenol; beta-Phellandrene and so on. The content of the identified compounds is 92.46% of the oil. The content (20.77%) of Cycloserine is the highest.