The invention belongs to the technical field of granular active carbon production in a gas-solid fluidization mode, and relates to a device for preparing the granular active carbon using plant straw and other solid waste of farm products as raw materials by a sound field and jet flow coupled and strengthened gas-solid contact type fluidized bed. The structure of a main body of the device comprises a nitrogen gas inlet, a double-vertical jet pipe type carbon dioxide inlet, a sound wave generator, a sound wave adjuster, a speaker, a gas distribution plate of a circulating fluidized bed, a biomass spiral feed port, a main body of the circulating fluidized bed, a cyclone separator, a quartz sand circulating discharge pipe, an active carbon collecting pipe, a heat exchanger, a gas-liquid separator, a quartz sand and active carbon separator, a baffle plate of the gas distribution plate, an oblique-type gas distribution plate, a gas inlet control valve, and a gas outlet control valve; the parts are combined in principle to form an active carbon preparation device for bubble pyrolysis and circulating activation of the sound field and jet flow coupled fluidized bed; and an outfield strengthened jet flow fluidized bed reactor has a novel and reliable structure, and flexible operation, and can continuously perform production to save energy.