Printed circuit board

Disclosed is a printed circuit board. The printed circuit board comprises a top layer, a bottom layer and a fixed hole which penetrates through the top layer to the bottom layer in the longitudinal direction. The portion, outside the fixed hole, of the top surface of the top layer is provided with a first copper foil ring. The portion, outside the fixed hole, of the bottom surface of the bottom layer is provided with a second copper foil ring. The first copper foil ring is provided with a plurality of first welding spots at intervals. The second copper foil ring is provided with a plurality of second welding spots at intervals. The portions, expect the first welding spots, of the first copper foil ring are provided with solder masks. The portions, expect the second welding spots, of the second copper foil ring are provided with solder masks. According to the printed circuit board, the first copper foil ring and the second copper foil ring can be prevented from being damaged in the process of screw locking in