Abstract: Susceptibility evaluation is conducted at the Changbai Mountain area where debris flows frequently occur. Thirteen influence factors are chosen as the evaluation indices, including the slope height, slope, aspect, annual precipitation, annual evaporation, density of debris flow, population density, tectonism, fluviation, formation lithology, groundwater types, geomorphological types and land use types. The frequency curve of debris flow and the magnitude curve of information are drawn based on 110 debris flows points. Continuous indices classification is based on catastrophe points on the curve and discrete indices classification is based on the existing standards. The grid data model of GIS platform and weight information model are used to obtain the information values of each index. The susceptibility evaluation results show that the high susceptibility areas are characterized by poor tectonism, closing to rivers and tectonic lines, erosion and denudation landforms, and agricultural and residential lands. The AUC value is conducted as the accuracy of the susceptibility evaluation of debris flow. The accuracy is 93%. The total area of higher susceptibility areas and high susceptibility areas accounts for 19% of the study area, and most of the areas are safe.