Abstract: Periodic rises and falls of reservoir water level cause the repeated dry-wet cycles of reservoir slope rock, resulting in significant changes in rock creep characteristics, and affecting the stability of the slope directly.A nonlinear threshold element was connected with the Nishihara model in series to establish a constitutive model of rock creep considering the effect of dry-wet cycles.The new model was embedded into FLAC3D and used in the creep analysis of the left bank slope in Jinping I Hydropower Station.The results show that the nonlinear creep constitutive model proposed could accurately describe the whole process of rock creep, and the secondary development program could accurately calculate the rock creep displacement.When it was used to simulate and analyze the slope creep displacement under different dry-wet cycles, we obtained satisfied results, and the location and range of the area where the slope creep displacement significantly increased could be given intuitively.The findings can provide a reference for taking reasonable engineering measures to maintain slope stability and ensure the operation safety of dams.