In comparison between the anti slide pile and the anti slide pile with prestressed anchor cable, many advantages of the anti slide pile with prestressed anchor cable are revealed. For instance, it changes the stress of the traditional anti slide pile, changes the cantilever beam into the species simply supported beam and changes passive support into initiative support, and so on. Design and construction key points are disserted in detail in combination with concrete engineering example, then the reinforcement effectiveness has been proved to be good: reducing cro...