寒冷地区拱坝的温度应力比南方大得多，温度荷载的影响可能超过水荷载．本文提出在拱坝下游面用苯板作永久保护层，以降低温度荷载、减小拱坝厚度，还给出了相应的计算方法．响水拱坝加固采用了苯板保温方案． Arch dam in the cold temperature stress is much larger than the south, the impact of temperature load may exceed the water load. This paper proposes that the downstream surface of arch dam with benzene plate as a permanent protective layer to reduce the temperature load and reduce the thickness of the arch dam, but also gives the corresponding calculation method. Xiangshui arch dam reinforcement using benzene board insulation program.