High precision punching device for printing

The invention discloses a high precision punching device for printing. The high precision punching device has the benefits as follows: a driving device performs up-and-down movement along with a movable plate, when the movable plate moves downwards, a first toothed rack moves downwards to drive a ratchet wheel to perform clockwise motion, the ratchet wheel is stopped from moving due to the structural characteristics thereof when performing clockwise motion, so that a conveyor belt does not move, a punching needle performs punching, then the movable plate moves upwards, the first toothed rack moves upwards to drive the ratchet wheel to perform anticlockwise motion, and the conveyor belt moves rightwards for a certain distance; besides, by controlling the up-and-down movement of the movableplate, the punching position is located precisely, a paper scraps collecting drawer is arranged, paper scraps produced during the punching process are collected and prevented from being blown around to contaminate the working