In view of the influence of water intake project on water flow and sediment in the harbor basin,taking Huanghua Port harbor water project as an example,we apply the method of three-dimensional mathematical model based on the analysis of regional engineering natural conditions and sediment conditions on the tidal current and sediment,and analyze the point of view of the various water solution siltation effect on flow conditions and sediment basin.The results show that after the water intake project is implemented,the flow speed in the whole harbor is not large,and the flow velocity is below 0.1 m?s except the intake port.The water intake project is not cause the change of the mud pit in the surrounding waters,and has little effect on the siltation of the inlet channel and the harbor basin.After the water intake project is implemented,the normal operation of the port will not have an influence on the design of the maximum water discharge range.