Abstract: Pyrolysis characteristics of litter of eight tree species in Nanchang were studied based on thermogarvimetric analysis results. Three components of flammability of the eight species, i.e. ignitibility, combustibility and sustainability, were evaluated by pyrolysis parameters obtained from the analysis. Results showed that the eight species could be grouped into two categories: the first one included Camellia oleifera and Cinnamomum camphora, which were highly ignitable but low combustible and sustainable, the other included Cedrus deodara, Liriodendron chinensis, Phyllostachys heterocycla, Cinnamomum burmanni, Osmanthus fragrans and Ginkgo biloba, which were low igni-table but highly combustible and sustainable. This further indicated that rankings by each flammability component were usually not identical, showing the complexity of flammability and necessity of multi-dimensional flammability evaluation. Three-dimensional flammability evaluation could reflect different profiles of the feature and aid better understanding and explanation of fire behavior.