Abstract: To further elucidate the anti-sliding mechanism of frame anti-slide piles and optimize their structural parameters,this study first applied structural mechanics theory to derive the internal forces of frame anti-slide piles under a planar rigid frame assumption,analyzing their anti-sliding behavior. Subsequently,Abaqus CAE finite element software was employed to evaluate slope stability and variations in maximum bending moments of the piles under different structural parameters,leading to optimized design recommendations. Practical structural parameters for frame anti-slide piles in engineering applications were proposed. Finally,a comparative analysis was conducted on the deformation behavior of frame anti-slide piles,double-row anti-slide piles(without connecting beams),and portal anti-slide piles under varying slope-top loads. The results indicate that the optimal parameter ranges are:beam spacing between 1/2L and 3/4L(where L is pile length),pile spacing between 4D and 5D,and row spacing of 8D(where D is pile diameter). The pile-head displacement of the frame anti-slide pile was smaller than that of the other two pile types,and an exponential function relating pile load to pile-head displacement was established for the frame anti-slide pile. This study provides a reference for parameter design and displacement monitoring of frame anti-slide piles in practical engineering.