Auxiliary discharging device and corn harvester

The utility model relates to an auxiliary discharging device and a corn harvester, and belongs to the technical field of corn harvesting equipment. The auxiliary discharging device comprises an auxiliary conveying sleeve, an auxiliary conveying auger and a connecting piece, the auxiliary conveying sleeve is used for being detachably or rotatably connected to an auger shell of the corn harvester, a discharging opening is formed in the auxiliary conveying sleeve, and the discharging opening is used for being formed in the end, away from the auger shell, of the auxiliary conveying sleeve; the auxiliary conveying auger is rotationally assembled in the auxiliary conveying sleeve; the connecting piece is used for being connected with the auxiliary conveying auger and the grain recycling auger in the auger shell when the corn grains are discharged, so that the auxiliary conveying auger is driven by the connecting piece to rotate along with the grain recycling auger to discharge the corn grains. The corn harvester co