Coil based on PCB and wireless charging device

The utility model discloses a coil based on a PCB and a wireless charging device. The coil comprises a PCB, the PCB comprises a first surface and a second surface, the first surface is provided with acoil body which is formed by etching a first conductive layer covering the first surface and arranged in a spiral shape, and an outer wire head of the coil body extends along the first surface to form a first electrode; the portion, located on the inner ring of the coil, of the PCB is provided with a conductive hole penetrating through the first surface and the second surface of the PCB, an innerwire head of the coil is electrically connected with the conductive hole, and the portion, located on the second surface, of the conductive hole is electrically connected with the second electrode. According to the technology, the coil is directly etched on the first conducting layer of the PCB, on one hand, the problem that a traditional winding coil is large in thickness is solved, and on the other hand, the problems th