Abstract: The welding performance of erosion-corrosion resistant steel BMS1400 was compared by using submerged arc welding with 50, 60 and 80 kg welding wires. The results show that the specimens welded with 50 and 60 kg welding wires have similar tensile strength, which is over 600 MPa; while the sample welded with 80kg welding wire has a tensile strength bigger than 760 MPa. All the welded samples have excellent cold bending performance, but the strain is concentrated on the bending position, and high strength welding wire can reduce strain concentration of the welded joint. Under the welding heat input of 19.6-22.3 kJ/cm, the low temperature toughness of the welded joint increases with the increase of the strength of welding wire.Weld softening and hardness peak are observed in welded joints with 50 kg and 60 kg welding wires, while the hardness of the joint welded with 80 kg welding wire is more uniform.The structure of the weld heat affected zone is related to the distance from the weld, the mircostructure of the position closed to fusion zone and HAZ center is lath bainite and a small amount of martensite, and that near base metal is banded ferrite and pearlite similar to the high tempering structure.The plate welded with higher strength welding wire has better low temperature impact toughness and the strain concentration is reduced, so as to obtain better welding joint performance.