There are many specifications of cutter suction dredger,which are widely used,and it is of great economic value to study the factors to control its construction cost and adopt targeted measures.To optimize and minimize construction costs of cutter suction dredgers,according to the current dredging quota,the construction cost composition of cutter suction dredger is analyzed,the factors that have a greater impact on the cost are found,practical and effective cost control methods are proposed,the influence of dredger size,operational conditions,and soil characteristics on costs is analyzed in combination with production efficiency,and the optimal suggestions aregiven.The results show that fuel cost,maintenance cost and depreciation cost are the main factors affecting the construction cost of cutter suction dredger,and the construction cost of cutter suction dredger can be controlled by optimizing the construction organization plan,technological innovation,fine management,and improving the localization and intelligence of ship equipment.Taking into account the unit price composition and efficiency of the vessel,the larger ship type should be selected as much as possible during the construction process.