Abstract：The mechanism of frost heaving of canal lining blocks is studied and the methods of calculating frost heaving and freezing of canal are discussed. On the basis of the works，a means of combination with cutting and resistance is proposed to deal with the frost heaving. The suitable tab of concrete in canal blocks and corresponding thickness and size in different position of cross section are calculated to obtain a optimum section of canal lining blocks with frost heaving，and some detailed measures are put forward to solve the problem of frost heaving in canals. This research was applied to devise the main canal and branch canal in Shibaochuan Reservoir and a good effect was realized. It not only solves the problem of frost heaving of canal but also declares the maintenance cost，improves the efficiency of routing，and saves water resources.
