The invention discloses a full-automatic closed-circuit circular extraction device. The device comprises a magnetic stirring water bath pot, an evaporation kettle, an extraction kettle, ultrasonic/microwave auxiliary equipment, a condenser, a support frame, a horizontal support, an extraction container and a dual-sealing cover; a support is arranged at the pot bottom; the evaporation kettle is arranged in the pot; a sealing cover and a steam pipe are arranged on the top of the evaporation kettle; a flow guide pipe is arranged between the evaporation kettle and the extraction kettle; the dual-sealing cover comprises an inner cover and an outer cover; the outer cover is fixedly connected with the extraction kettle in a sealing mode; the extraction container is connected with the inner cover in a sealing mode; mesh holes are formed in the extraction container, and a return pipe is arranged on the inner cover; the condenser is fixed to the support frame and comprises a water cooling part, a natural cooling part and a drainage pipe; the drainage pipe is detachably connected with the return pipe in a sealing mode; the natural cooling part is detachably connected with the steam pipe in a sealing mode; the support frame, the magnetic stirring water bath pot and the ultrasonic/microwave auxiliary equipment are arranged on the horizontal support. The whole device is a closed-circuit system, no solvent is lost in the extraction process, and steam in the evaporation kettle serves as driving force for achieving automatic circulation of the whole system.