Abstract: Suspended sediment concentration (SSC) is an extremely important in the studies of estuary flow and sediment environment, which is closely linked with port project, waterway and ecological environment. Along with lots of dams being constructed in the Yangtze River Basin in recent years, the river transport sediment decreased quite a lot and the estuarine environment changed significantly. In the light of this new condition, this study collected the SSC data at 51 stations over ten years in the Yangtze Estuary to analyze the SSC spatial and temporal distributions, and evident spatial and temporal variations were found. In space, SSCs in the north branch are generally larger than the South Branch transversely, and longitudinally SSCs firstly increase and then decrease seaward. As to the interannual changes, the SSCs in the Yangtze Estuary show a fluctuant downward trend because of the riverine sediment flux decline. In the mouth bar area, SSCs fluctuated visibly in response to the strong influences of winds and waves.