在东北地区修建的混凝土坝溢流面冻融和冻胀破坏现象非常普遍 ,其程度也比较严重 ,轻则影响观瞻 ,重则威胁大坝安全运行。为此 ,不得不进行大规模的修补和加固。文中介绍大坝溢流面冻融与冻胀破坏情况 ,并分析其破坏原因及应采取的防范措施 The freeze-thaw and frost heave damage of the overflow surface of the concrete dam constructed in the northeastern region is very common, and its severity is also relatively serious, ranging from the impact on the view and the heavy threat to the safe operation of the dam. To this end, had to be large-scale repair and reinforcement. The paper introduces the freeze-thaw damage and frost heave of the overflow surface of the dam, and analyzes the causes of the damage and the precautions to be taken