Abstract: For X65 pipeline steel plus N06625 nickel-base alloyed compound pipe, two welding processes, TIG and MAG, were adopted for pipe-to-pipe butt joint. Through metallographic observation and mechanical properties & corrosion resistance tests, the quality of circumferential welded joints is comprehensively evaluated and analyzed. By selecting suitable welding consumables and strictly controlling heat input in these two welding processes, the research results show that the girth weld seam with good morphology, reasonable microstructure, mechanical properties and corrosion resistance fully meet the engineering requirements. This combined welding scheme guarantees the weld quality of the cladding layer and transition zone, but also improves the efficiency of fitting and welding and reduces the cost of pipeline construction.