Abstract: This paper comprehensively analyzed the dam safety operation management of the Dashankou Hydropower Plant in Xinjian autonomous region and summarized successful experience and problems as well. This paper laid emphasis on the cause of gravity buttress cracks as well as treatment for seepage in the dam foundation, which were the two main special topics during the first dam periodic safety inspection. The first periodic inspection promoted the dam safety operation management of Dashankou Hydropower Plant.