NOVELTY - Biogas device with stirring function, comprises a biogas tank (1), a biogas tank well cover (2), a feeding port (3) and a discharge hole (4). The biogas tank is provided with a lower bearing (5). The biogas tank well cover is provided with a top drive motor provided with a composite gear box device. The biogas tank well cover is vertically set with a shaft hole. The device further comprises a rotating shaft whose lower end is connected to the lower bearing. The upper end of the rotating shaft passes through the shaft hole connected to a power output terminal of the composite gear box device.    USE - Used as a biogas device with stirring function.    ADVANTAGE - The biogas device utilizes mechanical stirring principle so that the static solution changes into dynamic solution; improves the dirt-removing capability, and gas production capacity; and prevents the incrustation of floating residues, and blockage by the generation of precipitate.    DETAILED DESCRIPTION - Biogas device with stirring function, comprises a biogas tank (1), a biogas tank well cover (2), a feeding port (3) and a discharge hole (4). The biogas tank is provided with a lower bearing (5). The biogas tank well cover is provided with a top drive motor provided with a composite gear box device. The biogas tank well cover is vertically set with a shaft hole. The device further comprises a rotating shaft whose lower end is connected to the lower bearing. The upper end of the rotating shaft passes through the shaft hole connected to a power output terminal of the composite gear box device. The composite gear box device can drive the rotating shaft to rotate. The rotating shaft is provided with a lower stirring impeller. The rotating shaft is provided with an upper stirring impeller. The shaft hole and the rotating shaft are provided with a seal pad.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the biogas device with stirring function.    Biogas tank (1)    Biogas tank well cover (2)    Feeding port (3)    Discharge hole (4)    Lower bearing (5)