Vehicle-mounted hedge trimmer

The invention discloses a vehicle-mounted hedge trimmer. The vehicle-mounted hedge trimmer comprises a rack, a wobble box, a cutting knife board, swing rods, a rotating shaft, pusher dogs and a driving device. The rack is used for being installed on a vehicle; the wobble box is fixed on the rack; the cutting knife board comprises a transverse rod and blades, and the multiple blades are fixed to the transverse rod at equal intervals in the transverse direction; the swing rods comprise the first swing rod and the second swing rod, the first end of the first swing rod is perpendicularly and fixedly connected with an output shaft of the wobble box, the second end of the first swing rod is rotationally connected with the first end of the transverse rod through a pin, the first end of the second swing rod is rotationally connected with the rack through a pin, and the second end of the second swing rod is rotationally connected with the second end of the transverse rod through a pin; the rotating shaft is rotational