The invention discloses a flexible printed circuit board (FPC), which comprises an insulating cover film layer, a conductive copper foil, an insulation substrate and a first reinforcing plate, wherein each layer is connected with and attached to one another through an adhesive, the conductive copper foil is etched with a zero insertion force (ZIF) splicing golden finger, one part of the first reinforcing plate extends in the upward direction and the downward direction respectively to form extended pins of the first reinforcing plate, and the distance from the extended pins of the first reinforcing plate to one end of the first reinforcing plate close to the ZIF splicing golden finger is equal to the splicing depth of the FPC. By applying the scheme of the flexible printed circuit board, the splicing positioning precision of the FPC can be improved, the conditions of being not in place and offset in the splicing process of the FPC are avoided, and the electric contact reliability of the FPC after splicing is improved.