The engineering geology and hydrogeology at dam site of Xiangjiaba Hydropower Station is complex , and the prob-lems of strong permeable rock mass and seepage stability are serious , so the seepage control treatment of dam foundation is the key of the construction .We proposed several measures , such as the deep curtain and shallow drainage measures , the cutting wall at dam foundation as well as the composite grouting at some key parts , so as to form an integrated seepage control system;some dynamic optimization and adjustment schemes are adopted in the construction process .The monitoring data after impoundment show that the optimized design is obviously effective , which ensured the impoundment safety .%向家坝水电站坝址区工程地质水文地质条件复杂，岩体透水性强，渗漏及渗透稳定问题突出，因而坝基渗控处理成为工程建设的重点和难点。为此，通过采用深帷幕、浅排水、设置坝基防渗墙，以及对关键部位进行复合灌浆等措施，形成了完整的坝基渗控体系；在施工过程中采用动态设计优化和调整方案，蓄水后监测成果表明，优化调整措施成效明显，保证了大坝正常蓄水安全。可为类似砂岩地区的渗控工程设计与施工提供有价值的参考。
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