According to the Coast Reclamation Plan (2010—2020),we adopt the currently advanced third-generation wave model SWAN to simulate the wave fields before and after the reclamation engineering in summer,winter and typhoon period,which are verified by the effective wave data obtained by the Jason-1 altimeter,to analyze the impact of Jiangsu coastal reclamation on the Jiangsu nearshore wave field in province.Results show that the significant wave height and period keep unchanged basically in the northern area after implementation of reclamation,while the significant wave height and period vary greatly in the southern sea area.But the impact is limited and it’s magnitude is small.