Abstract: The chemical compositions and their contents in yunyan and yanmo concrete were analyzed by coupling solid-phase microextraction (SPME) with gas chromatography-mass spectrometry (GC/MS). The quantitative analysis was performed by square peaks obtained from total ion chromatography to nomalization. The determination results were compared with each other. The forty-seven components in yunyan concrete are identified and the fifty components in yanmo concrete, their composition account for 86. 04% and 81. 37% of the total volatile components. The content of nicotine in yunyan concrete is much lower than that of nicotine in yanmo concrete, the content of neophytadiene is higher. A small quantity of alcohol compounds are introduced in the preparation of concretes. These characteristics can be applied for establishment of scientific basis of utilizing natural resources and developing of tobacco essences.