The chemical constituents of essential oil from Ligularia przewalskii (Maxim.) Diels were analyzed by the capillary GC-MS method. By capillary chromatography, more than 60 peaks were isolated. Among them 55 compounds were identified, which accounted for 56.39% of total content of essential oil. The main chemical constituents were hexane (12.82%), 2-methyl-pentane (11.18%), methyl-cyclopentane (6.61%), 3-methyl-pentane (6.41%), 2-methyl-hexane (3.53%), 3-methyl-hexane (2.81%), 1-methoxy-4-(1-propenyl)-benzene (2.03%), etc.