Abstract: The periodic water level regulation in the Three Gorges reservoir area between 145～175 m promotes the deterioration damage and stability attenuation of the limestone bank slope in Wuxia section of Three Gorges Reservoir.In this paper, a slip-tensile calculation model was established by introducing deterioration depth L0 and slip-thickness H to study the slip-tensile risk caused by erosion and deterioration of bedding limestone bank slope in the Wuxia section.The results showed that when L0 was unchanged, the bank slope was more prone to instability and the instability distance x significantly increases with the increase of H.As L0 increased, the slip instability distance x of the same H rock layer obviously increased, which can be increased by more than three times.The deterioration attenuation of the parameters of the rock strata made the bedding bank slope more prone to deep layer and large-scale instability failure.When L0 was small, it was easy to slide and crack along the back of the slope shoulder.As L0 gradually increased, the failure mode was transformed to sliding tensile instability that occurred simultaneously at the front and rear of slope shoulder.It was suggested to adopt the combined scheme of sliding block anchor cable(rod) reinforcement for the slope shoulder and the back edge+ "net hanging+shotcrete+random bolt" support for the rock formation at the front edge of the slope shoulder to achieve the purpose of "fixing head" and plugging "deterioration damage" channel.The research results provide a certain technical reference for the stability analysis of rock mass deterioration and engineering treatment of bedding limestone bank slopes in reservoir areas.