Abstract:Abstract: Gravity retaining wall Is the retaining structure most widely used in the design, besides the regular designs, there are some points that are easily ignored. Such as the check of the size of the retaining wall. the distinguish of the limited fill?behind the wall and the dealt with these conditions. The control of the rate of rainfall by the water , the measures to heighten the retaining wall and so on .Engineering designers need to think and sum up how to deal with the situations safely and economically ?in practical engineering.