The completion of the Changsha comprehensive hydraulic pivot had a great influence on the evolution process of mid-channel bars in the bifurcated reach of the lower Xiang River. Three representative bars(Zhenpi Bar, Luobo Bar, Shaping Bar) in the reach were selected to analyze the evolution process and main influencing factors of mid-channel bars in the past 30 years, based on Landsat remote sensing images, measured topographic data of this reach in 1983, 2008 and 2015, as well as measured water and sediment data of Xiangtan hydrological station of years. The results showed that the inter-annual runoff variation in the lower reach of the pivot was small and the distribution basically maintained stable during the year, but the annual sediment transport volume showed a downward trend of cyclical fluctuation. However, the sediment transport load in the dry season of the 1990s increased compared with the same period of the 1980s. The 3 mid-channel bars were in a state of natural development, with an increase in area and volume from 1984 to 1994. They all increased by different degrees from 1994 to 2005. They kept expanding in 2009 until the operation of the Changsha Comprehensive Hydraulic Pivot in 2012, after which the bars started shrinking.