Flexible printed circuit

The invention discloses a flexible printed circuit. The flexible printed circuit comprises a signal layer, an insulating medium layer and a ground layer, wherein the insulating medium layer is filled between the signal layer and the ground layer; at least one high-frequency signal transmission line is arranged on the signal layer; an area on the ground layer corresponding to the at least one high-frequency signal transmission line is hollowed to form at least one through slot; and two ground leads are parallelly arranged on two sides of the at least one high-frequency signal transmission line respectively. A first preset distance is reserved between each of the two ground leads and the at least one high-frequency signal transmission line in the direction vertical to the signal transmitting direction of the at least one high-frequency signal transmission line, so that the transmission of a high-frequency signal is realized by relying on electromagnetic induction between the high-frequency signal transmission l