Abstract: This paper introduces brief status on two natural protection areas on the former river of Lower - Jingjiang, and represents the river characteristics of Lower - Jingjiang, which is a typical meandering river and has complicated connecting retation with Dongting Lake, and the complexity of its river evolution. Since 1950s, a series of river control and bank protection works have been implimented, so the swing of river is restricted, but now the river reach near Shihou is still in acute change. According the calculated results of 1 - D mathematical model, after Three Gorges Project (TGP) running, the scouring quantity, scouring depthand water level degradation of the Lower - Jingjiang reach, especially Shishou to Jianli reach, would be maximum among the downstream streches of the dam, so this reach will occur acute evolution. The paper analyses the influences of Lower - Jingjiang evolution on Tainezhou natural protection area after TGP running and unfavorable aspects including both affecting the safety of natural protection area due to reservior clear - water releasing and decreasing the water - body exchange with the former stream because of water level degradation. The countermeasures are put forward, including intensifying research and observation, adopting engineering measure to increase water - body exchange and strictly prohibiting proisonous sewage to be drained in.