After many studies and researches, some key technologies, such as the shape optimization of arch dam, crack and seepage control at dam heel, the seismic fortification measures, the flood discharging and energy dissipation measures, dam foundation treatment and the abutment foundation treatment, have been solved progressively.

Using the definition of clogging in the other field,this paper concludes the concept and definition of clogging about seepage prevention of dam foundation,and seepage clogging equipment is self-designed and made.

The application,construction method and attention matters of compound geomembrane "two fabrics and one membrane" were introduced with its application to dam face anti-seepage in Qinggangxia Hydroelectric Station.