Abstract: It is a rather well-known fact that bank-slope deformation and failure result from the coupling of Earths endogenic and exogenic geological processes,in which different dynamic-force factor has a different correlation to the evolution of bank-slope.In Tiger Leaping-gorge region,endogenic and exogenic geological processes are very prominent,and in different reaches the deformed and failured masses develop dissimilarly.The correlated degree of the density of deformed and failured masses and correlative dynamic force factors in Tiger-Leaping Gorge Reach are analyzed by effect measure analysis method which combines qualitative and quantitative analysis,and the key dynamic factors of bank-slope stability are established,which can provided the scientific information for origin division,evaluation,prevention of geological hazards and project planning.