The invention discloses a weeding device. The weeding device comprises a weeding machine and a connecting member used for connecting the weeding machine to a control device of a weeding vehicle. The weeding machine comprises a bracket, a motor, a blade and a baffle, wherein a first end of the bracket is fixed to the connecting member; the motor is arranged at a second end of the bracket; the blade is of a circular shape, and the edge of the blade is provided with cutter tooth; a rotation shaft of the motor is fixed to the central portion of the blade; the baffle is disposed between the motor and the blade; the baffle and the blade are respectively provided with a predetermined gap; the baffle is fixed to the bracket, and the baffle covers the portion of the blade towards the connecting member; the motor is used for driving the blade to rotate. The weeding device is capable of improving the weeding efficiency.