An extensively occurring and calamitous proress of gravitational erosion causing the red weathering mantleslope to fall in is known as slope disintegration or slope failure. Usually. it can be divided into following forms ac-rnrding to its shape features. a. linear disintegration. b. forked disintegration. c. gourd ladle-like disintegration. d. dustpan-like disin-tegration. e. badland disintegration. The change processes of its shape has undergone water erosion stage first and then gravitational erosion. Theerosion processes of disintegration include the falling back of the gull walls cespacially the gully heads and the re-erosion of the colluvial deposits. And its erosion mechanism is closely related to the following situations; a. mechanical componment of the red erath and its changes with water action. b. types of the crack in the redweathering mantle. c. impact of storm events. d. impact of the elements of a hill.