We know that the dam materials have been determined in the process of the dam reinforcement, in this case can only through the upper wall on ways to reduce the infiltration line. This paper was based on this combined with the reinforcement process of a main reservoir explaining that the scheme selection about using drainage edges to lower infiltrating line of the body, and through the application of this technology, showed it is a good way to lower the infiltrating line of the dam, and eventually an effective and simple measure to reinforce dams.