Nearshore riverbed evolution has great impacts on the stability of river regime and the safety of bank-revetment worksand dikes. Since the 1990s， especially after the Three Gorges Researvoir running， significant channel degradation has occurred alongthe Jingjiang Reach because of the sharp decrease in the incoming sediment load， which led to the corresponding adjustmentin nearshore riverbed. According to the monitored data of the nearshore riverbed in this reach， the response of the nearshoreriverbed evolution to the flow and sediment conditions have been investigated in three aspects： （1） the relationship between thecharacteristic value of scour hole and flow-sediment conditions； （2） the response degree of the stability of nearshore riverbed onthe variation of water level；（3） the response degree of the channel geometry scale of nearshore riverbed to the flow and sedimentprocess. Through the calculation and analysis， the qualitative and quantitative correlations were obtained between the characteristicvalues of nearshore riverbed and the flow-sediment regime.