NOVELTY - A device for producing a biofuel through quick biomass pyrolysis, comprises a drier (1), a powder mill (2), a storage hopper (3), a feed mechanism (4), a pyrolysis reactor (5), a heat carrier collecting box (6), a heat carrier lifting bucket (7), a heat carrier heater (8), an accurate heat carrier temperature controller (9), a heat energy supply device (10), a primary separator (11), a secondary separator (12), a carbon collecting box (13), a primary condenser (14), a secondary condenser (15), a first condensate storage barrel (16), a second condensate storage barrel (17), and first pump (18).    USE - The device is useful for producing a biofuel through quick biomass pyrolysis (claimed).    ADVANTAGE - The device solves the problems of low energy source utilization ration, high operation cost, and actual production continuity in the existing biomass pyrolysis process. Moreover, it also solves the problem that mostly no accurate temperature regulation and control function is provided for the heating temperature of a heat carrier in the existing biomass pyrolysis process device.    DETAILED DESCRIPTION - A device for producing a biofuel through quick biomass pyrolysis, comprises a drier (1), a powder mill (2), a storage hopper (3), a feed mechanism (4), a pyrolysis reactor (5), a heat carrier collecting box (6), a heat carrier lifting bucket (7), a heat carrier heater (8), an accurate heat carrier temperature controller (9), a heat energy supply device (10), a primary separator (11), a secondary separator (12), a carbon collecting box (13), a primary condenser (14), a secondary condenser (15), a first condensate storage barrel (16), a second condensate storage barrel (17), a first pump (18), a first heat exchanger (19), a second pump (20), a second heat exchanger (21), a biofuel product collecting box (22), and a draught fan (25); where the drier (1) is communicated with the powder mill (2); the powder mill (2) is communicated with the storage hopper (3) that is communicated with the feeding opening of the pyrolysis reactor (5) through the feed mechanism (4); the bottom of the heat carrier heater (8) is communicated with the heat carrier inlet end of the pyrolysis reactor (5) through the accurate heat carrier temperature controller (9); the heat carrier outlet end of the pyrolysis reactor (5) is communicated with the top of the heat carrier collecting box (6); the bottom of the heat carrier collecting box (6) is communicated with the heat carrier inlet end of the heat carrier heater (8) through the heat carrier lifting bucket (7); the pyrolysis product outlet end of the pyrolysis reactor (5) is communicated with the pyrolysis product inlet end of the primary separator (11); the pyrolysis product outlet end of the primary separator (11) is communicated with the pyrolysis product inlet end of the secondary separator (12); the pyrolysis product outlet end of the secondary separator (12) is communicated with the pyrolysis product inlet end of the primary condenser (14); the carbon outlet ends of both of the primary separator (11) and the secondary separator (12) are communicated with the inlet end of the carbon collecting box (13); and the output end of the carbon collecting box (13) is communicated with the carbon inlet end of the heat energy supply device (10). An INDEPENDENT CLAIM is a method for producing a biofuel through quick biomass pyrolysis by using the device, comprising: (a) coarsely crushing the biomass raw material; (b) starting the heat energy supply device (10); where the smoke generated in the heat energy supply device (10) enters the heat carrier heater (8) to heat the heat carrier; starting the feed mechanism (4); where the accurate heat carrier temperature controller (9) controls the temperature of the heat carrier at 600 degrees C and the reaction temperature in the pyrolysis reactor (5) at 425-550 degrees C; and the product of the pyrolysis reaction of the biomass powder comprises a pyrolysis gas and carbon; (c) causing the heat carrier to flow out from the bottom of the pyrolysis reactor (5) and enter the heat carrier collecting box (6), and returning the heat carrier back to the heat carrier heater (8) through the heat carrier lifting bucket (7) for recycling; (d) causing the pyrolysis gas to enter the primary condenser (14) after flowing out of the secondary separator, obtaining the condensate A at the bottom of the primary condenser (14); condensing the uncondensed gas in the secondary condenser (15) to obtain the condensate B; guiding the pyrolysis gas not condensed out from the lower portion of the secondary separator (15) to enter the uncondensed gas burner (10-1) in the heat energy supply device (10) for combustion; and burning the carbon in the combustion chamber (10-2) by the heat generated to generate smoke; and (e) causing a portion of the condensate A generated in the primary condenser (14) to flow into the biofuel product collecting box (22) to obtain the biofuel, and the other portion to flow into the first condensate storage barrel (16) and then to be pumped into the first heat changer (19) through the first pump (18); feeding the low-temperature condensate A reduced in temperature back to the top of the primary condenser (14) for spraying; causing a portion of the condensate B generated in the secondary condenser (15) to flow into the biofuel product collecting box (22) to obtain the biofuel and the other portion to flow into the second condensate storage barrel (17) and then to be pumped into the second heat changer (21) through the second pump (20); and feeding the low-temperature condensate B reduced in temperature back to the top of the secondary condenser (15) for spraying; where the smoke generated is mixed with the smoke generated from combustion of the carbon in (d) and then enters from the lower section of the heat carrier heater (8); and the smoke after heat exchanger enters the drier (1) and is finally guided out via the draught fan (25).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the device for producing a biofuel through quick biomass pyrolysis.    Drier (1)    Powder mill (2)    Storage hopper (3)    Feed mechanism (4)    Pyrolysis reactor (5)