Abstract: In this peper,data from Disaster Reduction in China,have been used to statistically analysethe disaster by tropical cyclones that occurred from 1979 to 1996 within the area of GuangdongProvince. By the method of Fuzzy Subsets Theory,the conditions of the disaster have been disscussed and the evaluation model of the disaster is set up. The index of the disaster of every tropicalcyclone have been obtained,and have been divided into five parts. The result shows that the indexis almost Proportional to the direct economic loss, so this model is feasible.