The invention relates to the technical field of
metal circular
pipe welding processing auxiliary devices, in particular to a
metal circular
pipe welding device which comprises an operation panel, fourgroups of legs, a
welding machine, a left fixed plate, a right movable plate, a left lead screw, a limit square column, a left barrier, a right barrier, a circular boss, a support rod, an upper clampplate, a lower clamp plate, an upper rotary arm, a lower rotary arm, two groups of support springs, a left rotary shaft, a right rotary shaft, a right ejecting plate, a left hand wheel, a rear support plate, an upper ejecting plate, two groups of threaded pipes, two groups of threaded rods, a movable block and a mounting plate. A welding gun is arranged at an output end of the welding
machine. The
metal circular
pipe welding device has the advantages that welded metal circular pipes can be fixedly clamped by the metal circular
pipe welding device, two groups of metal circular pipes can be prevented from moving in welding procedures, and the use reliability can be improved; butted weld seams of two groups of circular pipes can be continuously circumferentially welded by the metal circularpipe welding device, weld protrusions at welded circumferential locations can be reduced, follow-up
polishing treatment working procedures can be reduced, accordingly, labor force and the economic cost can be reduced, and the practicality can be improved.