When the working environment of cutter suction dredgers is with strong wind and waves,it has a great influence on the work process,even possible to cause some serious accidents such as spud fracture.At present,the major measure is to take a shelter from the wind according to weather conditions,but the influence of waves on the cutter suction dredger’s work process is difficult to be quantified.The wave force is calculated by AQWA software,then the wave force is transmitted to the ship hull and spud and the bearing capacity of the spud is calculated by the finite element software.The research shows that the “Diantianniu” series electric cutter suction dredgers are able to work in the environment with a wave height of 1 m and a wave frequency of 0.167,but the force that is transmitted to the spud is close to the safe allowable stress.So if the wave height or frequency is still increasing,it should be considered to stop working.