Abstract: The displacement of soil influences soil pressure acting on retaining structure greatly.Therefore,the mechanical analysis considering deformation is put forward.The soil pressure expressions considering displacement are adopted if displacement ranging between 0 and ultimate magnitude,while the soil pressure expressions considering sliding surface are adopted for outside the ultimate displacement.The displacement making soil achieve to ultimate state can be obtained by former researchers.The results of soil pressure expressions are identical with the results of centrifugal model experiment and finite element method.The consistency attests to the rationality of expressions.In addition,the soil pressure calculation formula can be applied to practical case and guided for construction perfectly.