The invention relates to a steel pipe normalizing furnace, which belongs to the technical field of metal pipe processing kilns and comprises a furnace body of an open flame continuous heat treatment furnace, wherein one end of a furnace hearth of the furnace body of the open flame continuous heat treatment furnace is a burning heating heat insulation region with a smoke discharge opening, the other end of the furnace hearth is a cooling region, and the burning heating heat insulation region and the cooling region are communicated through a narrow neck passage. The steel pipe normalizing furnace is characterized in that a preheating air heat exchange mechanism used for pre-heat-exchange purposes on high-temperature smoke gas from the smoke discharge opening is matched and connected onto the smoke discharge opening, a cooling smoke gas inlet pipe used for introducing the cooled smoke gas into the cooling region is arranged on the cooling region, and a smoke gas cooling mechanism is matched and connected onto the cooling smoke gas inlet pipe, is connected with the preheating air heat exchange mechanism and is used for receiving the preheated smoke gas from the preheating air heat exchange mechanism. The steel pipe normalizing furnace has the advantages that the steel pipe normalizing can be completed in the furnace, so the defect of environment influence can be overcome, and in addition, the steel pipe normalizing furnace also has the advantage that the resources and the energy sources are saved.