Abstract: This paper based on the physical simulation and finite element analysis(FEA) for the marine high strength steel,the numerical simulation of the welding deformation for the marine block steel structure was established by artificial neutral network(ANN).Through simulating the welding parameters,the thickness of armor plate and the welding sequence,the influencing factors to marine steel structure were studied.The valid path of controlling the welding deformation for marine high strength steel was attained.The simulation results showed that in all kinds of factors,the welding sequence was the main factor to influence the welding deformation.By choosing little electric current of the same direction backstep welding,the deformation in the welding process of the marine block steel structure was controlled.By above method,the deformation of marine high strength steel was predicted rapidly at the welding process.It really offered a theoretic direction for the marine development and manufacture,avoided the blindness of the welding experiment.