In order to solve the problem of the traditional u-shaped canal, including of size small, joint bad problems, water penetration, and bad ability of frost resistance, this paper launched preliminary research of a new u-shaped product development. Length of new canal products is twice;;steel fiber of coated copper can increase resistance of rust and crack than traditional U-shaped canal. Hydro-expansive rubber of Putty type was applied to improve the compatibility of deformation joint and improve the permeability resistance. The best filling cross-section rectangle is truly adopted, not only having all advantages of traditional U-shaped canal and ladder type, but also having high mechanical properties, excellent durability, good environmental performance, good quality assembly components, high ratio of cost and performance. It is upgrading products of control the structure of traditional u-shaped slot and ladder type slot and can solve the "last kilometer" problem in the field.
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