Abstract: Dashankou Hydropower Station is currently the largest hydropower station in Xinjiang. During the first dam safety periodic inspection, we have complemented works on two aspects of dam structure and dam safety monitoring respectively, including special topic analysis on the forming reason of crack and hazard caused by cracks in gravity abutment, design, construction and supervision for treating it, treatment design to seepage of dam foundation, evaluation for dam safety monitoring system and observation data analysis, plans for refurbishing the monitoring system, installation and regulation for stage I plumb line system. A full range of high quality service that we offered have obtained good effects and have also got the owner’s praise.?