摘要： Based on GC-qqqMS/MS, a qualitative and quantitative analysis method for characteristic markers in gasolines was established. According to the established method, different models (92#, 95#, 98#) and regions (south, central, northeast, northwest China) of gasoline were studied and analyzed. The results show that the gasolines can be classified by the relative contents of aromatics, naphthalene series, indene and other characteristic substances. On the basis of the high sensitivity and selectivity of GC-qqqMS/MS, the experiment has identified the characteristic substances, and used characteristic-ratios methods and stoichiometric tools to achieve the models and regional differences of gasolines. It is conducive to the identification and classification of ILR in public security in fire cases, and meets the actual handling demand.