Abstract: Relying on the engineering problems caused by a landslide resurrection under the action of reservoir water,this paper aims at understanding the deformation and resurrection mechanism and critical conditions of the landslide,to provide a basis for environmental impact assessment and comprehensive disposal. By collecting the historical work data on the landslide area,the landslide identification is landslide.By using both a qualitative and quantitative analysis,this paper evaluates the landslide stability before and after water storage. By using multiple-phase ground surveys and safety monitoring,this paper evaluates the mechanism of the influence of hydropower water storage on the landslide surrounding environment based on the site situation. The main conclusions are as follows:（1） The cognitive process of Luojiaping landslide are initially considered as a deformation,identified as a landslide at medium-term with its scope being determined. Finally,its scope and thickness are rechecked and corrected.（2） Early Jinsha River water level is low,the leading edge of landslide being drainage,its overall stability is stable. Water reached 354 m in 2012,front edge of the slope was immersed,landslide resurrection caused existing construction and structures produced cracks,whose stability was less stable. Water reached 370 m in 2013,increasing deformation of the landslide resulted in expanding the cracks in the existing buildings and structures,its stability being critical. Continue storage to 380m,the Landslide deformation rate continues to intensify,its stability was critical. So the water storage level of 370 m can be considered as the critical water level for Luojiaping Landslide.（3） Environmental impact assessment is Shuisui secondary road and migration works before water storage can normally be used. Secondary roads,bridges and dwellings do not affect their formal functions,deformation increases to 370 m,cracks of existing buildings and structures are expanded,their functions are damaged. Some dwellings collapses to water storage level of 380m. Environmental impact indirectly proves several stages of landslide resurrection,closely relating to the water storage of hydropower stations.（4） In-situ reinforcement disposal can only reinforce the landslide part above the secondary road,which has no effect on the underwater part. The above conclusions can provide an analogy basis for the adjacent projects in the reservoir area.