Abstract: In fluctuation of reservoir water level, the deformation of landslide will lag behind the water level variation, and this hysteresis of slope deformation changes over time.In order to solve the difficult problem of landslide deformation prediction caused by the varied landslide deformation hysteresis, we studied the change law of landslide deformation hysteresis with time based on the correlation analysis method and the long-term monitoring data of Yulinerzu landslide in Xiluodu Reservoir area.And a landslide displacement prediction method considering landslide deformation hysteresis change was proposed.The research results show that the hysteresis of landslide deformation gradually appears with time, the deformation hysteresis days increase from 1 day to 11 days during the second cycle to the fifth cycle, and the hysteresis of landslide deformation is more obvious when the reservoir water level rises.The universality of the prediction method is verified by the deformation of Wangjiashan landslide in Baihetan Reservoir area.The verification results show that the predictive methodology exhibits commendable accuracy and universality.The comprehensive analysis shows that the method can provide reference for the deformation prediction of other reservoir landslides.