Abstract: Taking the Dongchuan district in Kunming as the study object, assess the post earthquake fire risk by structure risk probability and usage risk probability. After introducing the major hazard installation correction factor, the post earthquake fire probability model of single building is built. By image and data analysis on ArcGIS, the post earthquake fire risk level of Dongchuan district is evaluated. The study shows that the buildings in the new district and central district are frame structure and brick concrete structure.They have low density of buildings and high seismic degree, the post earthquake fire risk is low; while the old district and marginal administrative village have high density of buildings and low seismic degree, and the post earthquake fire risk is high.

Key words: post earthquake fire, fire risk assessment, GIS