The invention relates to a welding pipe adjustable vertical roll tool comprising a welding torch, large vertical rolls, small vertical rolls, cantilevers and pull rods. The small vertical rolls include the first small vertical roll and the second small vertical roll, the cantilevers include the first cantilever, the second cantilever, the third cantilever and the fourth cantilever, the pull rods include the first pull rod and the second pull rod, two ends of the first small vertical roll are respectively mounted on the first cantilever and the second cantilever, two ends of the second small vertical rod are respectively mounted on the third cantilever and the fourth cantilever, two ends of the first pull rod are respectively mounted on the first cantilever and the third cantilever through screw pairs, two ends of the second pull rod are respectively mounted on the second cantilever and the fourth cantilever through screw pairs, a first roll shaft is arranged on the first cantilever and the second cantilever, a second roll shaft is arranged on the third cantilever and the fourth cantilever, and the first roll shaft and the second roll shaft are mounted on a pipe welding machine through the screw pairs respectively. By the arrangement, mechanical property of welding lines is improved, weld failure caused by subsequent bend machining or flaring machining is reduced, and rejection rate of products is decreased.