The invention discloses a PCB wiring diagram for USB3.1 interface female-to-female. The PCB wiring diagram comprises female seat ground pin pads, female seat PIN pads, upper layer circuits, lower layer circuits and upper layer circuit and lower layer circuit via hole contact points, the female seat ground pin pads are welded to the ground pin pads on the four corners of a PCB, the female seat PIN pads are welded to the middles of the upper side and the lower side of the PCB, the upper layer circuits and the lower layer circuits are interleaved to be connected to wiring mouths of the female seat PIN pads, and the upper layer circuit and lower layer circuit via hole contact points are arranged on the interleaved upper layer circuits and lower layer circuits. The upper layer circuit and lower layer circuit via hole contact points of the PCB wiring diagram are the same, one-time positioning and one-time operation are specially facilitated, the frequency of manual operation of putting on and putting down products is reduced, the efficiency and production schedule are improved, wiring of extremely small space is achieved, PCB raw materials are saved, and the cost of the raw materials is reduced.