NOVELTY - The system has an evacuation pipeline (18) that is installed between the biomass destructive distillation kettle (1) and the high-temperature heating furnace (2). One end of the evacuation pipeline is connected with the mixture gas outlet while another end passes through internal part of the high-temperature heating furnace. The heat cycle system is formed between the biomass destructive distillation kettle and the high-temperature furnace. The water ring vacuum pump (9) is installed on the connection pipeline.    USE - Biomass charcoal, gas, oil and pyroligneous co-production system.    ADVANTAGE - The biogas production system is convenient use, high yield product with low investment cost, co-production speed can be improved.    DETAILED DESCRIPTION - The co-production system has a biomass destructive distillation kettle (1), a high-temperature heating furnace (2) for doing high-temperature carbonization for vegetation raw material, a water cooling device (3) for cooing and synchronizing mixture gas 1 produced during vegetation raw material high-temperature carbonization process, doing gas-liquid separation for the mixture gas and correspondingly obtaining mixture gas 2 and mixture liquid, a water wash device (4) for water washing the mixture gas 2 obtained by cooling by the water cooling device and correspondingly obtaining wood tar, a liquid state separation device (7) for separating pyroligneous in mixture liquid gas-liquid separated by the water cooling device and wood tar, a gas storage tank (5) for storing wood gas, a water ring vacuum pump (9), a compressor (10) connected with the water ring vacuum pump, a wood tar storage tank (6) for storing wood tar and a pyroligneous storage tank (8) for storing pyroligneous, the biomass destructive distillation kettle is installed on a furnace of the high-temperature heating furnace, a mixture gas outlet is installed on the biomass destructive distillation kettle, a mixture gas inlet, a mixture gas outlet and a mixture liquid outlet are installed on the water cooling device, a mixture gas inlet and a water wash outlet are installed on the water wash device, a liquid inlet, a wood tar outlet and pyroligneous outlet are installed on the liquid state separation device. The mixture gas outlet of the biomass destructive distillation kettle is connected with the mixture gas inlet 2 of the water cooling device via a connection pipeline, the mixture gas outlet of the water cooling device is connected with mixture gas inlet of the water wash device via a connection pipeline, the water wash outlet is connected with the gas storage tank via a connection pipeline, the mixture liquid outlet of the water cooling device is connected with the liquid inlet of the liquid state separation device via a connection pipeline (11-4), the wood tar outlet and pyroligneous outlet of the liquid state separation device is connected with the wood tar storage tank and the pyroligneous storage tank via a connection pipeline(11-5) and a connection pipeline, a vacuumization control valve (12) is installed on the connection pipeline 1 (11-1), a water wash control valve (13) is installed on the connection pipeline 2 (11-2), a gas storage control valve (14) is installed on the connection pipeline 3 (11-3), a pyroligneous storage control valve (15) and a wood tar storage control valve (16) are installed on the connection pipeline 5 and the connection pipeline 6 (11-6), a control valve (17) is installed on the connection pipeline 4 (11-4); an evacuation pipeline (18) is installed between the biomass destructive distillation kettle (1) and the high-temperature heating furnace (2), one end of the evacuation pipeline (18) is connected with the mixture gas outlet 1 (1-13), another end passes through internal part of the high-temperature heating furnace (2) to do combustion-supporting, a mounting opening for mounting the evacuation pipeline (18) is correspondingly installed on the furnace of the high-temperature heating furnace (2), an evacuation valve (19) is installed on the evacuation pipeline (18), the evacuation pipeline (18) forms heat cycle system between the biomass destructive distillation kettle and the high-temperature furnace. The biomass destructive distillation kettle and the high-temperature furnace make up high-temperature reaction system for doing dry blowing vegetation raw material and high-temperature carbonization and correspondingly generating mixture gas 1, the water cooling device and the water wash device make up an intermediate processing system 1 for cooling, water washing and gas-liquid separating the mixture gas 1, the liquid state separation device is intermediate processing system 2 for separating the mixture liquid gas-liquid separated by the water wash device and correspondingly obtaining wood tar and pyroligneous; the water ring vacuum pump is installed on the connection pipeline. An INDEPENDENT CLAIM is included for co-production method for Biomass charcoal, gas, oil and pyroligneous system.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of the co-production system.    Biomass destructive distillation kettle (1)    High-temperature heating furnace (2)    Water cooling device (3)    Water wash device (4)    Gas storage tank (5)    Wood tar storage tank (6)    Liquid state separation device (7)    Pyroligneous storage tank (8)    Water ring vacuum pump (9)    Compressor (10)    Connection pipeline (11-1,11-2,11-3,11-4,11-5,11-6)    Vacuumization control valve (12)    Water wash control valve (13)    Gas storage control valve (14)    Pyroligneous storage control valve (15)    Wood tar storage control valve (16)    Control valve (17)    Evacuation pipeline (18)