Abstract: By constructing a functional relationship between the weld penetration depth and the welding specifications of the double wire single pass submerged arc welding，as well as the functional relationship between the welding wire coverage area and the welding specifications of each wire single pass submerged arc welding，a welding specification corresponding to the groove size of steel plate，single pass double wire single pass submerged arc welding is designed，and the welding process of single-side submerged arc automatic welding formation with padded steel plate is used，which not only ensures the penetration of the butt steel plate，but also ensures that the welding wire coverage area meets the required deposition amount for the double-sided formation of the weld，and ensures the quality of the double-sided formation of the weld，resulting in freedom from the process of root-cleaning welding as needed for the seam top of the finished pipe as remained from the steel stripe butting welding process，and thus improving production efficiency.