After the completion of the Three Gorges reservoir,a series of changes in fluvial geomorphology processes will inevitably occur on bank slope of the reservoir.Two parallel permanent fluctuating belts will form on bank slope,and thus the power of reservoir water will fluctuate with changed water level.Changes in groundwater and reservoir water may affect bank slope surface and rock medium.The changes have physical,chemical and mechanics effects on rock materials,and influence loose deposits and rocky bank slope,differently.The major geomorphic processes may shift from gravitational geomorphic processes to creep,slide,collapse,erosion and washing processes,which transforms bank slope in turn.The geomorphic transformation and retransformation processes on bank slope will last for a long time.