The invention discloses a steel pipe butt-welding positioning support, which relates to the technical field of pipeline mounting and comprises a top plate, opposite wheels and a leveling mechanism; and the opposite wheels are fixedly arranged above the top plate fixed on the leveling mechanism by a vertical upright post. The steel pipe butt-welding positioning support adopting the technical scheme has the beneficial effects that two steel pipes can be accurately welded in place under the relatively irregular ground environment in the construction site, so errors are reduced, and only one person is required for welding after the device is well adjusted; and when the steel pipes need to be rotated, only idler wheels at two sides need to be rotated without the need of directly rotating the steel pipes and two persons for cooperation, the welding accuracy is improved, the labor is saved, and the well-adjusted steel pipe butt-welding positioning support can be instantly used without secondary adjustment after the position is adjusted.