本文在大量林内火险因子实测数据和历史火情火灾资料基础上,运用森林燃烧环理论,分析了死的和活的可燃物含水率与天气因子以及可燃物、火环境、火源3个方面诸火险因子与火发生、火蔓延、能量释放等火行为特征量之间的复杂关系;利用大系统理论逐级建立子系统,首次构造成多级递阶结构的大系统;利用CADCSC软件系统建立系统数学模型,建成了具有较高可信度的计算机仿真系统。 Based on a large number of forest fire risk factors measured data and historical fire fire data, based on the theory of forest burning ring, the paper analyzes the moisture content of dead and living combustible material and weather factors as well as combustibles, fire environment and fire source The complex relationship between fire risk factors and fire behavior characteristics such as fire occurrence, fire spread, energy release and so on. Using the large-scale system theory to establish subsystems hierarchically, the large-scale system with multilevel hierarchical structure is constructed for the first time. The CADCSC software system is used to establish the system Mathematical model, built with high credibility of the computer simulation system.