In order to reveal seismic behavior of batter pile group with high-rise pile cap， taking three kinds of earthquake waves as example， the effect laws of inclination angle and free pile length on seismic response were analyzed based on three-dimensional elastic-plastic dynamic finite element model. The results show that the maximum axial force of pile appears in 25 m approximately beneath the maximum erosion line and the maximum bending moment is located in the interface between pile cap and pile shaft. The vertical displacement and Y-orientation bending moment are symmetrically distributed along the pile shaft， and acceleration， lateral displacement， axial force， bending moment distributions along pile shaft are in the same trend. The greater free pile length， axial force of pile is larger and bending moment of pile is smaller. The greater inclination， axial force and bending moment of pile are larger. The influence on internal force is greater by the pile free length than the pile inclination. Subjected to the seismic load， acceleration and displacement of batter pile decrease， but its axial force and bending moment increase. The total bending moment of batter pile is controlled by Y-orientation bending moment.