Abstract:Accurate analysis of the contribution rate of various factors affecting the slope collapse deformation is of great significance to prevent and control landslide disaster. Through the collection of 32 actual toppling deformation cases analysis,, the contribution rate of the number, area, volume and thickness of slope dumping deformation of different geomorphic types is quantified and then get it’s comprehensive contribution rate to provides an auxiliary decision-making reference for the disaster prevention and control of different geomorphic types slopes. The research show that there are 5 types of landform in 32 actual slope samples: hill, basin, mountain, plateau and plain. In terms of the contribution rate of slope toppling deformation of different landforms, the number of mountain slope is the highest and the number of plain slope is the lowest. In terms of the toppling deformation area and volume contribution rate of the slope of different landforms, the contribution rate of the plateau slope area was the largest, and that of the plain area was the smallest. In terms of the thickness contribution rate of slope toppling deformation of different landforms, the thickness contribution rate of plateau slope is the largest, and that of basin slope is the smallest. From the analysis of the comprehensive contribution rate of the four factors which have mentioned above, It is concluded that the slopes of plateau and mountainous have the highest contribution rate to toppling deformation, accounting for about 69% of the all toppling deformation. Plain slopes have the lowest contribution rate of toppling deformation, accounting for about 3% of the all toppling deformation. This study provides supplementary support to prevent the occurrence of slope hazards