Abstract: In this paper,seawater corrosion-resistant welding procedure of 00Cr₁₈Ni₁₄Mo₂Cu₂ austenitic stainless steel was studied.With the improvement of welding procedure,width of heat-affected zone(HAZ) was reduced,difference of chemical constitution between HAZ and fusion zone(FZ) was minished,metallurgical structure of HAZ was refined,precipitate of Fe-Cr phase(σ phase) was controlled.The corrosion rate of HAZ was decreased and corrosion rate of weld joint(FZ,HAZ and base metal was emerged in corrosion liquor at the same time) was greatly decreased.