Abstract: Taking the unstable slope reinforcement design of the S11 Jingyuan (Gan-ning boundary)-Huating highway project as an example, the conventional rectangular anti-slide piles are relatively risky in the artificial hole construction process, and the single-row circular anti-slide piles cannot meet the anti-slide requirement. Therefore, the quincunx double-row anti-slide piles with crown beams are used as the reinforcement plan. Meanwhile, the madis software is used to model and analyze the stress, strain, displacement and internal force distribution of the anti-slide piles according to the typical section.