NOVELTY - A biomass microwave cracking circular comprehensive treatment device comprises biomass pretreatment system (1), microwave cracking furnace (2) provided with feeding opening (2-8), discharging opening (2-11), protective gas inlet (2-10) and gas phase product outlet (2-9); biomass feeding system (4) communicating with feeding opening; and gas phase product collecting and processing system communicating with liquid phase product outlet in gas phase product collecting and processing system.    USE - Biomass microwave cracking circular comprehensive treatment device.    ADVANTAGE - The device has low treatment cost of biomass and high utilization rate.    DETAILED DESCRIPTION - A biomass microwave cracking circular comprehensive treatment device comprises biomass pretreatment system (1), microwave cracking furnace (2) provided with feeding opening (2-8), discharging opening (2-11), protective gas inlet (2-10) and gas phase product outlet (2-9); biomass feeding system (4) communicating with feeding opening, biomass discharging system (5) communicating with discharging opening, protective gas control system (9) communicating with the protective gas inlet, gas phase product collecting and processing system (8) communicating with gas phase product outlet and containing liquid phase product outlet, microwave source and energy feedback system (3) located on microwave cracking furnace and shaft seal machine mixing system (6) with mixing machine located in microwave cracking furnace; and gas phase product collecting and processing system communicating with liquid phase product outlet in gas phase product collecting and processing system.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the biomass microwave cracking circular comprehensive treatment device.    Biomass pretreatment system (1)    Microwave cracking furnace (2)    Feeding opening (2-8)    Gas phase product outlet (2-9)    Protective gas inlet (2-10)    Discharging opening (2-11)    Energy feedback system (3)    Biomass feeding system (4)    Biomass discharging system (5)    Shaft seal machine mixing system (6)    Gas phase product collecting and processing system (8)    Protective gas control system (9)