Abstract: The paper aims to reveal the temporal and spatial characteristics and the occurrence regularity of rainstorm disaster in Weihui City, so as to reduce the loss caused by disasters.According to the theory of meteorological disaster system and the international evaluation model, the writer used the historical rainstorm disasters from 1961 to 2014、daily precipitation、DEM、GDP and per capita income of peasants.The assessment model of rainstorm disaster was constructed by means of AHP and PCA, and the zoning map with resolution of 30 m * 30 m meters was drawn by ArcGIS.The results showed that, the disaster risk in Weihui City showed a decreasing trend from the central to the surrounding. The disaster risk in Sunxing town, Jishui town, Dunfangdian village and Shangle town was higher, so heavy rainstorm disasters were prone to take place; while the disaster risk in Taigongquan town, Houhe town, Liyuantun town and Shibaotou village was lower, so the harm of rainstorm disasters to agricultural production was not serious.[CONCLUSION]The study is of great significance for the government and related departments to formulate the prevention of meteorological disasters，and to adjust the agricultural structure.