Writing brush head trimming device

The utility model discloses a writing brush head trimming device which comprises an installation base and a pressing and holding mechanism. Guide rods are evenly arranged at the lower end of the right side face of the mounting base, the four guide rods are slidably connected with guide holes correspondingly formed in the lower surface of the trimming box, rotating shafts are symmetrically and rotationally connected to the left end of the interior of the trimming box, and bristles are arranged at the front ends and the rear ends of the two rotating shafts; the rear ends of the two rotating shafts extend to the outer side of the trimming box, second gears are arranged at the ends of the two rotating shafts, the two second gears are connected in a meshed mode, a first motor is arranged on the front side face of the trimming box, and an output shaft of the first motor is fixedly connected with the front end of the rotating shaft at the upper end; the pressing and holding mechanism is arranged at the left end of t