NOVELTY - Biomass pyrolysis and polygeneration device comprises hopper, feeding system, crawler type pyrolysis reactor, gas-solid separation system, pyrolysis gas condensation system, gas burner, gas heat exchanger, coke grinder and cooling and discharging system. The hopper outlet is connected to feeding system inlet. The outlet of feeding system is connected to fuel inlet of crawler type pyrolysis reactor. The carrier gas inlet of crawler type pyrolysis reactor is connected to fuel gas outlet of gas heat exchanger. The coke outlet of crawler type pyrolysis reactor is connected to coke grinder inlet.    USE - Used as a biomass pyrolysis and polygeneration device.    ADVANTAGE - The device utilizes combustible gas generated during biomass pyrolysis as a heat source, thus provides heat required for the pyrolysis reaction in order to achieve thermal type pyrolysis process and generate solid coke and liquid product.    DETAILED DESCRIPTION - Biomass pyrolysis and polygeneration device comprises a hopper, a feeding system, a crawler type pyrolysis reactor, a gas-solid separation system, a pyrolysis gas condensation system, a gas burner, a gas heat exchanger, a coke grinder, and a cooling and discharging system. The hopper outlet is connected to feeding system inlet. The outlet of feeding system is connected to fuel inlet of crawler type pyrolysis reactor. The carrier gas inlet of crawler type pyrolysis reactor is connected to the fuel gas outlet of gas heat exchanger. The coke outlet of crawler type pyrolysis reactor is connected to the inlet of coke grinder. The outlet of coke grinder is connected to the inlet of cooling and discharging system. The pyrolysis gas outlet of crawler type pyrolysis reactor is connected to the inlet of gas-solid separation system. The gas outlet of gas-solid separation system is connected to the inlet of pyrolysis condensate system. The gas outlet of pyrolysis condensate system is divided into two. The gas inlet of gas heat exchanger is connected to the gas burner. The flue gas outlet of gas burners is connected to flue gas inlet of gas heat exchanger. The gas outlet of gas heat exchanger is connected to carrier gas inlet of crawler type pyrolysis reactor. An INDEPENDENT CLAIM is also included for a biomass pyrolysis and polygeneration method using the device, comprising conveying the biomass raw material into a crawler-type pyrolysis reactor via a hopper and a feeding system, transferring the material to a crawler transmitter, conveying the material into a gas heat exchanger, carrying out pyrolysis process under the action of high-temperature gas derived from a gas burner, conveying the high temperature pyrolysis gas product into a gas-solid separation system to remove the solid particles, then conveying into pyrolysis condensation system, condensing to obtain a liquid product, flowing the non-condensable gas from the outlet and then dividing it into two channel gases i.e. first channel gas and second channel gas, conveying the first channel gas into gas burner and the second channel gas into gas heat exchanger, combusting the first channel gas in the gas burner into high-temperature flue gas, conveying high-temperature flue gas into gas heat exchanger, then heating the second channel gas of heat exchanger to obtain high-temperature gas, conveying the high-temperature gas into crawler-type pyrolysis reactor to provide heat for the biomass pyrolysis process, conveying the high temperature pyrolysis coke product into the coke grinder, conveying the crushed coke into cooling and discharging system, and discharging in the form of powder after cooling.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the biomass pyrolysis and polygeneration device.