Based on two dimensional nested gird tidal current and sediment numerical model，we simulate the tidal current field and distribution of suspended sediment in reclamation of Haizhou bay. The simulation fits well with the measured data. Analyzing the impact of the current field on the surrounding sea and the annual change in erosion and deposition after the project,we know that the whole calculated area tidal current and suspended filed change little. But decrease of the current velocity near the project causes reduction of the tidal prism. The deposition is presented near the project sea.The siltation intensity of the filling pit at the left is larger,and erosion is presented in part of Linghong river estuary.