Cutter suction dredger often faces with harsh environmental conditions in offshore construction.It is essential that anti-wind capability of the ship will be improved by using the actual situation.Taking the“Tiankai”as a research object,based on the analysis of environmental forces including wind,sea current and wave,the paper analyzes the forces of the ship under various environmental conditions.The numerical simulation of the ship anchor seat model is carried out.The improvement scheme of the anchor seat is proposed.The anti-wind capability of the ship is improved.The anti-wind scheme of the ship’s offshore sea is proposed,and the adaptability and safety of the ship’s offshore construction are improved.