The Zhaoshuling landslide in Badong County, Three Gorges Reservoir, is crucial for road safety and land use. By using 3D finite element method, researchers simulated the landslide's stability under water stress and predicted its future stability and permeability after the reservoir's operation. The study found that changes in reservoir water significantly impact the landslide's stability, leading to potential instability in some areas post-reservoir operation. The paper provides principles and measures to prevent and manage the landslide effectively.