The invention discloses a heat treatment device for carbonized wood. The heat treatment device for the carbonized wood comprises a machine body. A seal cover is arranged on the machine body. A liftinggroove with a downward opening is formed in the seal cover. A lifting block with a toothlike periphery is arranged in the lifting groove. The lower end of the lifting block is fixedly provided with aseal rubber ring in a sleeved manner. A threaded groove with an upward opening is formed in the lifting block. A fixed threaded column is connected into the threaded groove in a threaded manner, andthe upper end of the fixed threaded column is fixedly connected with the upper end wall of the lifting groove. A first gear is connected with the left side of the lifting block in an engaged manner. The heat treatment device for the carbonized wood is simple in structure and convenient to operate, hot air in the device is evenly sealed through a seal device, and a rotatable holding plate enables heat-treated carbonized wood is evenly treated; besides, due to linkage arrangement of the seal cover, convenience is achieved, operation is easy, and the heat treatment device can be rapidly opened, and the heat treatment device for the carbonized wood is good in linkage performance, high in automation degree and suitable for being widely applied.