Trimmer with datum plane

The utility model relates to a trimmer with a datum plane, and mainly solves the problems of fatiguability, large cutting error and low efficiency caused by that a conventional trimmer is needed to hold tightly and strongly continuously with arms during a cutting process. The trimmer with the datum plane is characterized in that the bottom of a body (1) is connected with a tray (4) through a bolt; a honeycomb panel (3) is adhered in the tray (4); the lower surface of the honeycomb panel (3) protrudes out of the edge of the tray (4); and the tray (4) and the honeycomb panel (3) are vertically provided with through holes capable of penetrating a milling cutter (5) through. The trimmer with the datum plane can greatly alleviate burden of arms of an operation personnel and increase cutting precision and efficiency.