The FEM software ANSYS was adopted to study on the interaction between slope and stabilizing pile under seism loading, by a case of landslide reinforced by a stabilizing pile, and an artificial earthquake was excited as input motion. The results indicated as follows: Dynamic soil pressure and dynamic displacement at characteristic points of stabilizing pile were increased with the increase of acceleration of earthquake motion. The appearance time of their peak values was later than that of the peak of earthquake acceleration. There were larger differences occurring in the maximum value of resistances on the partial pile lain in stable rockmass and resistance distribution forms with different accelerations in different times. The distribution of the soil pressure on the pile inside the landslide was homogeneous except the top of the pile. The greater the earthquake acceleration, the larger the deformation of the anti-slide pile. And the displacements of the pile were decreased from top to bottom.