Abstract: In order to examine the influence of shear modulus on bridge pile foundation in a high-steep slope, the distribution of soil pressure is discussed, and a new simplified calculation model is presented according to the bearing characteristics of bridge pile foundation in the high-steep slope. Based on the Pasternak double-parameter spring model for foundations, a new ground resistance model is used to describe the shear action. The stress of pile elements of the loaded period and the fixed period is analyzed, and the governing differential equations are established. The finite-difference solution of displacement and force of pile foundation are obtained by solving these equations. The inner-force calculation is separately compared with the testing data of bridge pile foundation in the high-steep slope and an example of the Pasternak double-parameter spring model for foundations is presented. The results indicate that the theoretical calculation results are in good agreement with the experimental data, illustrating that this calculation approach is of great significance for the preliminary design of bridge pile foundation in high-steep slopes.