针对高层建筑火灾危险的特点， 通过对火灾场景的设定，从消防对策的角度对火灾进行了阶段划分，并针对每个阶段运用了事故树和事件树的方法进行了事故分析，找出了影响火灾发展和蔓延的相关因素，建立了多层次的高层建筑火灾危险评价的指标体系。该指标体系能为建筑物安全管理提供科学依据，也能为高层建筑火灾风险评估奠定基础。

Aiming at the characteristics of the high building fire, setting the fire site scene, this paper carries out stage partition for fire on the angle of the countermeasure for fire, conducts accident analysis aiming at every stage applying FEA and ETA，finds out the related factors that affects fire development and stretch，and establishes the multiple-levels index system of high building fire hazard assessment. This index system can offer scientific basis for safe management of building, and can also lay the foundation for high building fire hazard assessment.