Abstract: Based on the characteristics of tidal flow, suspended sediment concentration and the topographic change under datum of the Lingdingyang, the analytical calculation for the scheme selection of the Huangpu-seaward navigation channel in the Lingdingyang sea is carried out. Predication of siltation of every study navigation channel is performed.Calibration is made before using the formula developed by author for the calculation of the channel sedimentation, it is shown that the calculation values are closely agree with those measured in the prototype. From the amount of siltation, which in the east channel of Lingdingyang is less than that in the west channel, also siltation in the east channel of Tonggu is less than that in the west channel. But from the point of development and requirement, it is the same fessibility either developing the east navigation channel or deepening the west channel on the basis of its original depths.