Conductive heating type drum dryer

The invention discloses a conductive heating type drum dryer which comprises a drum drying bin, a roller path, a gear ring, a three-way joint device, an air seal machine, an exhaust device, a riding wheel and a driving device. The drum drying bin comprises a heat preservation bin and a drying bin. The drying bin comprises a drum, a metal mask, a heating pipe, a heat conducting pipe and spiral blades. The drum drying bin is driven by the driving device to rotate on the riding wheel. A circulation pump increases the flow speed of a heat conducting medium inside the metal mask and inside a guiding pipe, a heat conducting pipe and a heating pipe, the heat conduction speed is increased, heat conducting and heating of the heat conducting medium are performed inside the metal mask and the heatingpipe, the heating pipe of the rotating drying bin performs heat conduction on materials, due to the heating pipe with the high rotating crossed density, the material collision contact rate and the heat conducting area are in