通过对陕西省地震诱发的次生灾害泥石流的资料分析与实地调查，总结了泥石流的灾害特征，利用次生灾害危险性分区原则，确定了各影响因子对泥石流灾害危险性的影响程度，建立了泥石流危险性数学模型，利用 GIS 自然地理信息系统平台的空间分析计算功能，对陕西省泥石流灾害进行危险性分区。%Based on secondary debris flow data and in-situ investigation owning to the earthquake in Shannxi province,the paper summarizes debris flow disaster features,uses the secondary disaster division principles,determines the influencing degree of various influencing factors upon debris flow disasters,establishes debris flow risk math model,and carries out debris flow risk division by applying GIS geology information sys-tem platform space analysis calculation functions.
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