Drying furnace or pyrolyzing furnace with rotary material bed

The invention discloses a drying furnace or pyrolyzing furnace with a rotary material bed. The drying furnace or pyrolyzing furnace with the rotary material bed comprises a shell, the rotary material bed, a cylindrical supporting wall and an external support, wherein the shell comprises a top, a base plate and an outer side wall, the rotary material bed is arranged in the shell, the cylindrical supporting wall is arranged at the bottom of the rotary material bed, the external support is arranged close to the edge of the rotary material bed in the circumferential direction, and the rotary material bed is supported by the supporting wall and the external support together to rotate around the rotation axis of the rotary material bed. According to the drying furnace or pyrolyzing furnace with the rotary material bed, due to the fact that the supporting wall and the external support are arranged, the weight of the rotary material bed can be reasonably distributed, and the handling capacity of the drying furnace or pyrolyzing furnace can be greatly improved on the premise that operation is stable.