Brazing furnace

The utility model discloses a brazing furnace. The brazing furnace comprises a brazing furnace main body and supporting legs, the brazing furnace body comprises a brazing box. A furnace cover baffle is hinged to the brazing box; a transversely-arranged cylindrical hearth is arranged in the brazing box. A horizontally-arranged brazing plate is arranged in the hearth, a brazing screen plate is arranged above the brazing plate, a plurality of through holes are formed in the brazing screen plate in an array mode, a plurality of circular grooves corresponding to the through holes are formed in thebrazing plate, a cold water pipe groove spirally surrounding the hearth is further formed in the outer wall of the hearth, and a cold water pipe is arranged in the cold water pipe groove. The coolingdevice has the beneficial effects that the cold water pipe is wound on the hearth to cool the hearth, so that the cooling effect is good, and the cooling speed is high; and meanwhile, the brazing meshplate and the brazing plat