Abstract: The jointed rock slope is usually a complex geological body composed of joints and intact rock blocks, and the stability is affected by joint occurrence and slope excavation unloading.Therefore, the stability analysis of the jointed rock slope is the research hotspot of geotechnical mechanics.According to the complicated joint condition of the slope in Yuanjiacun iron mine, the experiment of similar material is designed.In this paper, the unloading failure process of slope excavation is reproduced through the test links of material preparation, joint prefabrication and excavation simulation, and the displacement of slope is monitored by XTDP photogrammetry system.Eventually, the whole process of deformation, failure and final sliding of bedding jointed slope during excavation is obtained.According to the test results, the crack depth and slip range of the complex multi-joint slope in Yuanjiacun iron mine during excavation are clarified, which provides a theoretical basis for the reinforcement and anti-slip disaster treatment of the slope in the later stage.