This article is based on the data of the tide and sediment in dry seasons at Qihai Port in the north branch of Yangtze River in 2012. According to the analysis some conclusions can be made as follows: suspended sediment concentration is positively correlated with current velocity; Suspended sediment concentration will rise to the peak right after high water level emerges or tidal current velocity reaches its maximum; The vertical distribution of suspended sediment concentration is shown as oblique line, quasi line and Alpha blend; In near shore the turbulence of suspended sediment appears in the mid and upper layer of water, while in offshore it appears in the lower; Salinity influences sediment resuspension; As current velocity rises, the suspended sediment concentration in the bottom seldom changes and the maximum suspended sediment concentration will appear in the mid layer of the water.