Steel welding device with positioning function

The utility model relates to the technical field of welding devices, in particular to a steel welding device with a positioning function, which comprises a moving seat, a welding machine is arranged on one side of the moving seat, and a convenient mechanism is arranged at the top end of the moving seat; by arranging the convenient mechanism, when rotating rods need to be sleeved with steel pipes, the steel pipes can be conveniently placed after the two rotating rods are staggered through two movable supporting plates, the steel pipe placing convenience is improved, and by arranging a butt joint assembly, through mutual cooperation of a first butt joint block and a second butt joint block, the steel pipes can be conveniently placed; the two rotating rods can form a concentric whole, so that the welding stability of the two steel pipes is guaranteed, the other rotating rod can be driven to synchronously rotate only by starting a second motor to drive one rotating rod to rotate under the interaction of a limitin