A large number of soil slope collapses-slides disaster have developed after the“8.8”earth?quake in Jiuzhaigou,which is more fragmented and has a smaller thickness. When the traditional trans?fer coefficient calculation model is applied to stability calculation of such slopes,there is a problemthat the overall slope calculation cannot reflect the stability of a slider. In this paper,the fragmenteddegree of collapse-slide slope is divided into:extreme fragmentation,high fragmentation,moderatefragmentation,slight fragmentation,and no fragmentation. Based on the transfer coefficient methodand considering the five degrees of fragmentation of the slope,this paper improves landslide stabilitycoefficient and thrust calculation model. Taking the collapses and slides of old Rexi stockade PowerPlant in Jiuzhaigou County as an example,the results of two calculation methods are compared. Theresults indicate:Compared with the traditional calculation method,the block differential stability cal?culation model more consistent with the actual situation,so there is a difference in the stability of eachslider calculated by this method. Some are not stable under extreme conditions and some are unstable.Based on the difference calculation results of the block method,a block control model for the collapseslide slope was obtained.