The main engine-driven trailing suction dredger is often overloaded due to short hydraulic filling pipeline，large pipe diameter，and high concentration of hydraulic filling transportation，resulting in insufficient propeller power and potential safety hazard. Therefore，we study the overload and power distribution by theoretical calculation and equipment performance operation analysis and put forward measures such as throwing bow and stern double anchors and optimizing power distribution of the main engine. The results show that after the power distribution of the diesel engines is improved，we can effectively solve the problem of overburden and greatly improve the productivity of the dredger suction.