The invention discloses a revolving-scraper type biomass pyrolysis reactor, which belongs to the field of biomass pyrolysis equipment. The revolving-scraper type biomass pyrolysis reactor comprises a heating cylinder, a revolving drum, a temperature control instrument, a dynamic seal, a bearing, a spray header, a hopper, a charging threaded rod, a charging motor, a circulating pump, a recirculated cooling liquid pipeline and an oil-water collecting cylinder, wherein the revolving drum is composed of a revolving shaft, a revolving-shaft through hole, a through hole of an external cylinder of the revolving drum, a revolving scraper, heat insulation cotton, a fixed wing and the external cylinder of the revolving drum. By using the reactor disclosed by the invention, the integration of a pyrolysis device, a cyclone separation device and a scrubbing-condensing device is truly realized; just through changing the preset temperature of the temperature control instrument and the revolving speeds of a revolving drum speed regulating motor and a charging speed regulating motor, the productivities of three products comprising biological oil, combustible gas and biomass carbon can be adjusted; and compared with the existing biomass pyrolysis reactor, the pyrolysis temperature is reduced by 100-150 DEG C.