To keep pace with development of stone masonry dam construction and standardize the design of stone masonry dams, Design specification for stone masonry dams (SL25-91) is revised to this Code so that the stone masonry dam design could be safe and applicable, economically viable, technology updated and quality ensured. This Code is applicable to the design of Class 2 and Class 3 masonry dams for large and medium water resources and hydropower projects or Class 4 and Class 5 masonry dams over 50m high. It may also be used as a reference for the design of other masonry dams.為適應砌石壩工程建設發展的需要，規范砌石壩設計，對《漿砌石壩設計規范》（SL25-91）進行修訂，使砌石壩設計做到安全適用、經濟合理、技術先進、質量保證，特制定本規范。本規范適用于大、中型水利水電工程中的2、3級砌石壩或壩高超過50m的45級砌石壩的設計。其他砌石壩設計可參照使用。