Abstract: This study examines suspended sediment concentrations (SSC) and compositions at Xuliujing in the Yangtze Estuary based on field data from 2003 to 2017 (15 years). Data analysis suggests that the average SSC of surface (2003-2017), middle-layer, and bottom (2010-2017) at Xuliujing was 0.07, 0.07, and 0.13 g/L, respectively. Overtime the SSCs exhibit a statistically significant decrease trend over the 15 years. The decline during the wet season is more severe than the dry season. Compared with the average SSC in 2003-2005, the mean SSCs have decreased by 57% and 20% in the wet and dry seasons, respectively, in 2015-2017. The surface SSCs exhibit a change points in 2008, with a mean decrease by 56% and 44% in the wet and dry seasons, respectively. Furthermore, the sediment composition exhibits irregular variations that maybe attributed to human activities, but insignificant directional changes over the study period. The D50 is 7.3, 9.4, and 11.0 μm at surface (2004-2017), middle-layer and bottom (2009-2017), respectively.