Abstract：To analyze the deformation and fracture mechanism and the harness effects of the landslide， by large scale model testing，the authors select several different materials to simulate corresponding rocks and structure for the model of the landslide with a model scale of 1∶200. The model has size of 240 cm×120 cm×20 cm. Based on the geomechanical model test，the deformation and fracture course of the landslide of four different states：natural state，excavating state and two different reinforcement state，are simulated；and the displacement of landslide，the stress state of anti-slide pile and bolt of different testing procedures are studied. On the basis of the testing results，the deformation and fracture mechanism of the landslide are analyzed；and harnessing effects of two different reinforcement designs are compared and optimized. The study result provides a scientific basis for mechanism study and treatment of the landslide.
