Abstract: Using the original data of forest fires frequency from 1979~2012 and the weather stations data in Sichuan province,an analysis is made on the spatial and temporal distribution of forest fires frequency and its relationship with meteorological conditions,and the major disaster area by forest fires is determined.The multivariate statistical regression analysis method is used to establish climate impact assessment models of forest fires frequency respectively in the major disaster area,and then the models are assessment checked.The results show that the models are very useful,and the correct rate reached 88.9% in Ganzi Tibetan Autonomous Prefecture.