Tidal current data of two periods at 13 tidal current surveying sites in the Deep Water Channel of Yangtze Estuary are analyzed respectively using tidal current harmonious program. The date of the NG0、NG3、CB1、CS0、CS1、CB2、 CS2、CS6、CSW、CS3、CS7、CS4、CS5 sites are divided into six layers. Tidal harmonious constants of 11 constituents are analyzed out. Tidal current character and tidal current elliptic factors of each site are calculated and analyzed.The research shows that the tide characteristic coefficient values are less than 0.25.The semidiurnal tidal current play major role in the measuring point area. M2 constituent is primary and the characters of tidal current are normal semidiurnal tidal rectilinear current in the sea area. The tidal current elliptic factors of the M2 constituents of six water layers at each tidal current surveying site are analyzed. The primary direction of tidal current is along Deep Water Channel. Spatial characteristic of current vector turn are complex. The current vector turn of upper water layer mainly shows clockwise. In lower water layer, seabed and landform factors affect the current vector turn greatly. The Greenwich phase lags of the six water layers at observation stations are studied. Summarizes the trend of elliptic elements, characteristics, trends, residual current in shallow water molecules, and the possible trend of flow velocity along the space change rule and the analysis of the dynamic impact. The M2 constituent of elliptic elements have stronger regularity, which has decrease trend along the spatial.The influence of shallow water factor to tidal current is prominent in shallow water area and the values increase from upper water layer to lower water layer . The results of the study isSbeneficial to understand the Yangtze Estuary deepwater channel dynamic condition, deposition mechanism and to guide the channel engineering regulation.