The essential oil of Pogostemon cablin from Suixi county, Zhanjiang City, Guang- dong Province was extracted by steam distillation and analyzed by gas chromatography- mass spectrometry (GC-MS). Meanwhile, the temperature-programmedretention index (PTRI) was employed to improve the accuracy of qualitative analysis.The relative concen- tration of each component was determined by peak area normalization. A total of 90 com- pounds were isolated, of which 50 compounds were chemically identified and accounted for 72.53% of the total peak area. Th...