对高土石坝，采用宽级配砾质壤土做防渗体，要确保渗透稳定，反滤布置设计是关键。本文根据土料材质和当地反滤材料通过理论计算和科学试验，确定满拉宽级配土心墙的反滤系统布置，使宽级配土得以应用于高土石坝工程。 For high earth-rockfill dam, the gravel loam is widely used as anti-seepage body. To ensure stable infiltration, the design of anti-filtering arrangement is the key. In this paper, based on the soil material and the local filter material through theoretical calculations and scientific experiments, to determine full grading width of the core wall of the filter system layout, so that wide graded soil can be applied to high earth and rock dam project.