Abstract: Planting the ccononlle fruit trees in tropical and subtropical areas，the lower temperature is a restricted factor Based on annual extreme temperature data from 1950 to 1999 in Fujian，the relation was analyzed between annum extreme tenmperature and fruit trees danlage，and the fruit trees damage was dixrided into 5 ranks First the number of fruit damage was cuunted in every ranks，then the station freezing index(SFI)was calculated，Based on statistics analysis，using SFI，assessment of the fruit trees cultivated feasibility was good.