| Forest fire is the forest vegetation area most important perturbation factor, also is the nature, biological, the ecological environment process latent threat.A geographical information system (GIS) is proposed as a suitable tool for mapping the spatial distribution of forest fire danger.In this study, Shimian county were chosen as test areas.Based on GIS﹑RS﹑Analytic Hierarchy Process(AHP) and inforamtion entroy techology, their vegetationtype ,altitude ,slop ,aspect ,and settlement buffer were selected as the main forest fire factors. The circumstances of forest fire risk were quantified by the factor-weights union method with the support of GIS. And all of them were overlaid in an integrated fire danger map. Five classes of forest fire risk ranging from low to extreme were generated. The high ,normal high,moderate,noraml low and low fire risk zones accounted for19.14%﹑30.66%﹑31.66%﹑14.38% and 4.16%.respectively ,which was in corresponding with normal distribution. About 49.80% of the test areas were predicted to be upper moderate risk zones ,indicating that the forest fire management task in these areas is superonerous. There was an obvious regional difference in the distribution of forest fire risk zones ,being higher in the center and lower around the center ,and the difference in fire factors was also obvious. This method could be used as the reference and guidance of forest fire management and another application field.
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