Abstract: The meteorological data in Dachuan district and 25 national weather stations surrounding Dachuan district for 30 years and the socio-economic data of Dachuan district were used. The GIS system was used to analyze the hazards of storm-flood and flood-caused factors in Dachuan district, the susceptibility of pregnancies, the vulnerability of disaster-affected bodies, and the ability to prevent and fight disasters. Statistics and regional division were conducted on the storm-flood disasters in Dachuan district. Storms and floods were counted and zoning in the Dachuan district. The results showed that the risk of storm floods in Dachuan district was mainly affected by various factors such as topography, landslide frequency, population distribution, and economic development level. Highly sensitive risk areas included the south Dachuan district（main city zone）, Yongjin-Shiqiao, Daorang-Hurang-Qiaowan-Shiti and Jingshi. And the sub-sensitive areas mainly included the Zhaojia, Baijie, Tingzi, Maliu-Wanjia-Dashu, Dongxing-Huangdu-Nanyue, Shuangmiao, Guanzi, Longhui, Baozi-Zhaogu and Luoche, Wusi-Yintie and other towns, which were the key areas for flood control and disaster reduction in Dachuan district. Moderately sensitive areas mainly included Heshi-Jinya, Fushan, Datan, Guancun-Jiuling-Chenjia-Dushi, Xianglong-Yanhe towns. The sub-low or low-sensitivity areas mainly included low mountain and high hill areas with higher elevations and further away from the river.

Key words: storm flood, risk, division, Dachuan district