The beet head trimming apparatus for a beet-harvesting machine comprises a frame, two flail hubs rotatable about an axis, flails, which are designed in order to remove leaves from beets remaining in the ground, and a drive in order to drive the flail hubs with respect to the frame. The drive comprises a motor and a gearbox and the flails are movably attached to the flail hubs. The motor and the gearbox are attached to the frame. The frame of the beet head trimming apparatus is coupled with a beet-harvesting machine. The beet head trimming apparatus couples the motor with an electrical and/or hydraulic energy source. The beet head trimming apparatus is a module that can be handled separately from the beet-harvesting machine.