NOVELTY - The device comprises a feeding port connected with a feeding end of a multi-stage inner spiral roller, where a discharging end of the inner spiral roller is connected with a feeding end of the roller through a through groove. A riding wheel mechanism supports a rolling ring. A motor gear of a transmission mechanism is driven to rotate the riding wheel mechanism. A lower part of the coil roller is provided with an external heating unit, and an upper end is provided with an inner heating unit. The outer and inner heating units are connected with a fuel gas conveying pipeline.    USE - Continuous biomass carbonization device.    ADVANTAGE - The continuous biomass carbonization device reduces pollution and tar, and improves heat circulation.    DETAILED DESCRIPTION - The device comprises a feeding port connected with a feeding end of a multi-stage inner spiral roller, where a discharging end of the inner spiral roller is connected with a feeding end of the roller through a through groove. A riding wheel mechanism supports a rolling ring. A motor gear of a transmission mechanism is driven to rotate the riding wheel mechanism. A lower part of the coil roller is provided with an external heating unit, and an upper end is provided with an inner heating unit. The outer and inner heating units are connected with a fuel gas conveying pipeline that is connected with a condensing separator through a gas holder. The ends of the inner spiral roller are connected through the smoke gas cover, where an air pressure of the inner spiral roller is less than a standard atmospheric pressure. The external heating unit is provided with a set of spraying nozzles. The roller is continuously heated to 400-450 degrees C. A condensing separator separates the wood tar, wood vinegar and wood coal gas. A lower part of the condensing separator is connected with a drain tube that is provided with a drain valve. The gas conveying pipeline is provided with an upper control external heating unit of the gas valve. A lower end of the gas distributing cabinet is connected with a gas tube that is provided with a gas valve.