Abstract：The interaction between the slope and dam body is evaluated by establishing numerical models of the slope and the dam simultaneously and adopting iterative algorithm based on the purpose of slope stability analysis and the dam body stress verification. This method not only improves the efficiency of modeling，but also reduces the difficulty of model construction. In order to simulate the construction processes and reveal the stress and deformation processes of the dam body and slope，the application of arch dam thrust is employed based on the states of excavation，unloading and reinforcement that have already been completed；and the effect of water pressure of the reservoir is also considered. The result indicates that the interaction between the slope and dam body is not remarkable；and the effect of the dam thrust against the slope displacement is within 30 m around the dam abutment，which means that the whole stability of the slope and the dam body will not be greatly influenced. The achieved result proves the rationality of the dam design；and it can provide references to the slope management and dam operation.
