Drilling device for improving drilling effect of circuit board

The utility model relates to the technical field of circuit board processing, in particular to a drilling device for improving the drilling effect of a circuit board, which comprises a frame and a drilling machine, and a first hydraulic cylinder for driving the drilling machine to move in the Z-axis direction is mounted at the top of the drilling machine. The bottom of the drilling machine is provided with a clamping assembly for clamping the circuit board in advance before the circuit board is drilled, the rack is provided with a Y-axis assembly for driving the clamping assembly and the first hydraulic cylinder to move in the Y-axis direction, and the rack is provided with an X-axis assembly for driving the Y-axis assembly to move in the X-axis direction. A supporting assembly for limiting and supporting the circuit board is mounted on the rack; before drilling, the two discs clamp and support the periphery of the drilled hole in advance, so that downward contact stress generated during drilling is transmitt