Abstract: The content of alloy in weld metal of marine high strength steel is high, so the welding problem is serious. Alloy composition design can help to obtain good strong toughness matched weld metal. Here is reviewed the weld metal alloy systems of high strength steel for ships, mainly including traditional C-Si-Mn-Ni-Cr-Mo alloy system, nuclear Ti-B alloy for promoting acicular ferrite nucleation, ultra low carbon bainite alloy and low manganese and high nickel alloy system.