Manufacturing method of PTH half hole of PCB

The embodiment of the invention provides a method for manufacturing a PTH half hole of a PCB, and the method comprises the steps: taking a semi-finished PCB, setting milling cutter parameters by taking a boundary between a PTH hole reservation region and a PTH hole removal region as a reference line, carrying out the primary milling of a PTH hole, and enabling a cutter entering point of a milling cutter located on a first side hole wall of the PTH hole to be away from the reference line by a first preset distance, moving the cutter along the datum line until the orthographic projection of the axis of the milling cutter on the datum line is a second preset distance away from the intersection point of a second side hole wall opposite to the first side hole wall on the PTH hole and the datum line, rotating the cutter to move along the datum line until the milling cutter moves out of the PTH hole by a third preset distance, and turning over the upper and lower plate surfaces to carry out secondary milling treatme