FLEXIBLE CIRCUIT BOARD AND MANUFACTURING METHOD, DISPLAY DEVICE, CIRCUIT BOARD STRUCTURE AND DISPLAY PANEL THEREOF

A flexible circuit board and a manufacturing method therefor, and a display device. The flexible circuit board includes a main body sub-circuit board and a bridge sub-circuit board; the main body sub-circuit board includes a first substrate, as well as a first bridge connection end, a second bridge connection end, a first wiring portion, and a second wiring portion disposed on the first substrate, the first wiring portion and the second wiring portion being mutually separated and being respectively and electrically connected to the first bridge connection end and the second bridge connection end; the bridge sub-circuit board includes a second substrate, as well as a third bridge connection end, a fourth bridge connection end, and a third wiring portion used for a first functional wiring, all disposed on the second substrate, the third bridge connection end and the fourth bridge connection end being electrically connected by the third wiring portion; the first substrate is not in direct contact with the second substrate, and the bridge sub-circuit board is configured to be separately and electrically connected to the first bridge connection end and the second bridge connection end by means of the third bridge connection end and the fourth bridge connection end, and is thereby installed onto the main body sub-circuit board. The wiring pattern of the flexible circuit board is simple and easy to manufacture.