High-precision boring device

The invention discloses a high-precision boring device which comprises a boring head, guide sliders, a slider cover plate, a boring rod and slider pushing hooks. Boring cutter holders are distributedon the boring head, slider sliding grooves are further formed in the boring head, the side projection of each guide slider is approximately in an 'L' shape, the guide sliders are correspondingly distributed in the slider sliding grooves, pushing hook limit grooves are further formed in the guide sliders and formed upwards from the top surfaces of the guide sliders, the guide sliders are combined with the boring cutter holders, the lower ends of the slider pushing hooks are connected with the boring rod, the upper ends of the slider pushing hooks are distributed in the pushing hook limit grooves, the boring rod is connected with a machine tool spindle, the boring head is driven to rotate, and the guide sliders are driven by telescopic movement to reciprocate in the slider sliding grooves along slopes of the slider