The expanding scale of sand mining in rivers has affected the stability of riverbed structure and its evolution process.In this study，based on the measured topographic data of Jiangjin to Fuling river section from 2007 to 2019，the distribution of sand mining pits in the fluctuating backwater area of the Three Gorges Reservoir is investigated，and the recovery process of sand mining pits in the key river section is analyzed.The results show that the sand mining volume in the fluctuating backwater area is about 163 million m3 from 2007 to 2019，the intense sand mining activities are mainly concentrated from 2007 to 2016 in the Jiangjin to Changshou river section，and the sand mining pits are mainly distributed in the river side beaches.With the implementation of the upstream mining ban measures in 2016，the sand mining activities at the end of the Three Gorges reservoir are significantly declined，while the further reduction of the sand inflow from the Three Gorges has caused the tiny change of the river topography in the end of the reservoir，and the sand mining pits could not be return to their original form according to the present sediment supply level.