该文根据北京市怀柔县喇叭沟门自然保护区的自然条件和森林分布状况 ,对森林和林区植被的易燃特性进行了研究和分析 .选取了植物 (树种 )组成、郁闭度、林分年龄、森林类型、坡向、坡度、海拔高度等 7个林分因子作为燃烧性分量 .通过对各小班的燃烧性综合指标的计算、排序 ,划分了 5个森林燃烧性等级 .并在此基础上 ,对喇叭沟门乡进行了防火区划分 ,为制定自然保护区规划和开展森林防火工作提供了依据 According to the natural conditions and forest distribution of Labagoumen Nature Reserve in Huairou County, Beijing, the flammability characteristics of forest and forest vegetation were studied and analyzed.Considering the composition of plant (tree species), canopy density, forest Seven forest factors including age, forest type, aspect, slope and altitude were selected as combustibility components. Five forest flammability ratings were obtained by calculating and ranking combustibility indexes of each sub-class. Based on the flats ditch Gate Township were divided fire district, in order to develop the nature reserve planning and forest fire prevention provided the basis