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A comprehensive and in-depth study on the two aspects, i.e, the rock-slope stability analysis and the landslide harnessed about the left bank of Xiao Dong River Electric Station in the Lei River is made in the paper. The main content are as follows:1. Though rational and quantitative description of some main factors, such as the resistance surplus of saturated slide in main slide controlling surface (belt) and in main slide belt, and the primary causes of the slope losing its stability, rock structure, geological effect and so on, the stability of rock-slope id divided into five grades.The main sources of power that analyze the rock-slope losing stability are ancient seismic, ancient flood, river diversion together with its credence erosion, and the foot of slope cut resulting from the construction of roads, railways and buildings. When the slope has the conditions of deformation and stability lost, the geology construction stress field and the selfgravity field will begin to adjust themselves again. In the course of adjusting the stress field and gravity field, the deformation rock body appear to lose its stability to achieve new balance and stability status.The rock structure, crystal stress, demolish power, the effect of water, slope-height, slope-angle, earthquake, the technology of slope excavated and other factors that affect the rock-slope stability are analyzed here.2. Though the study of the engineering geology conditions and properties of the landslide about the left bank of Xiao Dong River Electric Station in the Lei River. Based on the calculating result and from the point of the safe reliability, technical availability, economic rationality, etc, the author makes use of the reinforced scheme of network beam to reinforce and harness the landslide body, and set up perfect drainage system and supervision system during construction and utilization.
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