Efficient dredging is not only the goal that has been pursued in the process of dredging construction，but also a hot spot in research. Based on the control principle of intelligent dredging mode，this paper analyzes the construction data of the Binzhou Port project under the intelligent dredging mode of “Hangjun 6008” ship，establishes the capacity and control model，and further optimizes and calculates the capacity of this trailing suction hopper dredger in the Binzhou Port project. The results show that the productivity is affected and restricted by flow rate，slurry relative density，and pump characteristics. In the process of dredging，the intelligent dredging mode mainly depends on the cooperation between the AVC and the EPC. When the actual flow rate is higher than the （optimal） set value and other boundary conditions are invariant，the AVC will press down the visor to match the productivity of the drag head with the vacuum limit of the pump. When the pump limit reaches，the EPC reduces the flow rate by reducing the speed of the pump to achieve the optimal mixture speed.