Trimmer capable of adjusting chopping cutterhead gap

The utility model discloses a trimmer capable of adjusting the chopping cutterhead gap, which comprises a bearing seat sleeve pipe and chopping cutterhead seats. The chopping cutterheads are provided with rotating shafts thereon. Gears are provided on the rotating shafts whose top ends are each provided with a chopping cutterhead. A middle-part duplex gear is equipped inside the bearing seat sleeve pipe between the two chopping cutterhead seats. And a locking screw is provided on the bearing seat sleeve pipe between the two chopping cutterhead seats. The locking screw engages with the middle-part duplex gear. The end of the locking screw is provided with a turnbuckle. The utility model can perform any adjustment on the two chopping cutterhead gap by the cooperation of the locking screw and the duplex gear in no need of centering and satisfy the trimmer checking technical requirements with accuracy and speed. Furthermore, the utility model significantly reduces the time taken by the operator to adjust the trim