Machining method for preventing formed metal covered edge from generating burrs

The invention discloses a processing method for preventing a formed metal covered edge from generating burrs, and belongs to the technical field of printed circuit board metal covered edge processing, the processing method for preventing the formed metal covered edge from generating burrs comprises the following steps: cutting a plate, and carrying out primary edge milling and slotting on the cut plate; metallizing a slot position formed by the first edge milling; carrying out secondary drilling on the metalized plate; second-time edge milling is conducted on the joint position of the metal edge and the non-metal edge, and an intersecting groove is milled; carrying out alkaline etching; and carrying out third-time edge milling by avoiding the intersecting groove and the metal edge. Even if metal curled edge burrs are generated during milling of the intersecting groove, the metal curled edge burrs can be removed through chemical etching, finally, during third-time edge milling, the positions of the intersectin