Abstract: Based on the investigation results in Feiyun River Basin, Zhejiang Province, this study employed seven background factors in order to evaluate the susceptibility of typhoon-storm geohazards in eastern coastal areas in China. Seven background factors incude relative elevation, slope aspect, slope curvature, engineering rock formation, distance from faults, surface covering, slope stability(SHALSTAB model)which were defined using frequency ratio and information content model. Based on the weight of each factor determined by the analytic hierarchy process(AHP)method, with the consideration of the two climates consisting of no rainfall and one hundred year extreme rainfall, basin-scale geohazard susceptibility was evaluated by the comprehensive index method. The model is a combination of quantitative model and statistical model of the soil distribution area of disaster-causing soil, which conforms to the law of disaster-making in this region. The results show that after considering extreme rainfall, susceptibility grade increases successively, with the high-susceptible area increasing by 84% and the medium-susceptible area by 42.8%, suggesting that the dynamic evaluation for the susceptibility of geohazards under different operating conditions can be realized.