The CFD method is used to simulate the path curve and flow characteristic of bow-spray for trailing suction hopper dredger (TSHD).The spray distance and flow characteristic under different bow-spray conditions are simulated.The numerical simulation results correspond with the construction ones.The results show that the numerical simulation method can accurately predict the path curve of the bow-spray on TSHD and provide reference basis for the construction.On this basis,influencing factors of the spray distance and path are analyzed.The results show that the spray distance of the 45 degree angle is further than that of the 30 degree angle,but it is beneficial to control the sedimentation and loss under the 30 degree angle.Therefore,the best effect can be achieved under the different conditions by adjusting the different injection angles.