Abstract: In order to determine reasonable welding process and welding material, make the welded joint of duplex stainless steel S32205 with the desired microstructure and phase proportion to ensure the corrosion resistant ability of welding joint of duplex stainless steel, the microstructure, mechanical property and corrosion resistance of duplex stainless steel S32205 with different welding processes were analyzed, which would play a guiding role in welding of duplex stainless steel in the process of production.