The analysis of the dam prototype monitoring data can understand the change trend of the seepage pressure in the dam body in time and space，and to a certain extent，the dam body，dam abutment quality，seepage control and drainage filtration effect can be reversed.In 2010，twenty piezometric pipes were assigned for monitoring the seepage of the dam and the surrounding dam of the Junmin reservoir.After more than 7 years of continuous observation，a large amount of monitoring data was collected.In this paper，combined with reinforcement，quality inspection of cut-off wall and daily inspection status，the temporal and spatial distribution of monitoring data is discussed by drawing process line diagram and saturation map to analyze the main problems existing in the reservoir.Reasonable and feasible suggestions for future safety management are put forward.