Abstract：Taking an bank slope in Jiudian Gorge reservoir as an example,the displacement was used to preciously and continuously monitored by GPS to study the stability of reservoir bank slope in early reservoir filling and the deformation characteristic of the slope was analyzed in combination with engineering geological conditions.The slope entropy was used to analyze the stability of slope under different conditions of water levels.The result shows that the stability of bank slope was affected by reservoir filling and the rate of water level in a little degree with being stable on the whole; the displacement of the middle part of the slope was the largest,the displacement velocity trended to become smaller generally; the displacement deformation model was creep damage characteristics which was the central block pull the trailing edge.Finally,the reasonable management measures were put forward to provide reference for other similar projects.

Keyword：reservoir bank slope;stability;GPS monitoring;early reservoir impoundment;