Abstract: Through years of operation, masonry arch dams tend to be damaged to some extent. Especially in cold regions, repetitious cycles of freeze- thawand frozen- heave would not only make the proofed layers of dams percolate, but lower the strength of the dammaterials, thus affect the safety of the dams. The article described the leakage conditions of the Shichengzi masonry arch damin Xinjiang province, analysed its causes of leakage, and presented a leakage- prevention scheme of the combination of multilayer reinforcement steel net fastening, concrete spraying and cement sludge plastering and grouting. This technology abstracted the advantages of shotcrete rockbolt in supporting, and overcame the shortcomings of plastic- concrete- spraying in resisting freezethawand frozen- heave. And this technology possessed the characteristics of better resisting freeze- thawand frozen- heave, better leakage- prevention and enduring, thus particularly adapted to cold regions. Meanwhile, this technology was convenient to carry out, so it deserved popularization in leakage- prevention ofmasonry arch dams in cold regions.