Anti-slide pile has been used widely in constructing embankments on sloped weak ground,but the application of rigid group piles to strengthen embankments on sloped weak ground is still insufficient. Based on the numerical simulation,a comprehensive investigation on the sloped weak ground reinforced by rigid piles was conducted by using software ABAQUS. The paper studies the influence of piles design parameters such as pile spacing,elastic modulus on its internal forces and deformation. Compared with the reinforcement without piles,the maximum settlement value of the embankment decreased by 1.5-1.93 times,and the lateral deformation value of the foundation decreased by 1.46-2 times. With the increase of the elastic modulus of rigid piles and embedded depth,the stress state of rigid piles does not significantly increase. The impact of pile spacing on rigid piles is significant. With the increase of elastic modulus and pile spacing,the reinforcement effect is improved in some extent. It is found the pile spacing is more effective to reduce the pavement settlement value of the embankment compared with the elastic modulus. Under the consideration of the factors such as the stability of embankment,force,economy etc,the pile group spacing of rigid pile group is 2 m,and the elastic modulus is 10GPa in this project.