According to the feature of Dalian offshore airport artificial island project and the sea area, hydrodynamic and sediment transport models were set up. Verification and validation were carried out against measured data. Details were given about the variations of nearshore hydrodynamic characteristics of Jinzhou Bay with the construction of artificial island engineering. And the influence on the sea bed, with the transportation of sediment considered, was computed. The outcomes of the study lay a foundation for the feasibility analysis of the Dalian offshore airport artificial island exploitation.