▎ 摘　　要

NOVELTY - The embodiment of the utility model claims a printed circuit board and electronic device. The printed circuit board includes: a circuit board main body, the circuit board main body comprises a first surface and a second surface opposite to each other, the circuit board main body is further provided with a heat conducting through hole passing through the circuit board main body; a plurality of electronic components located on the first surface, a plurality of electronic components comprises a heating source device; a plurality of copper sheet, the plurality of copper sheet comprises at least one first copper sheet and at least one second copper sheet, the first copper sheet is located on the first surface, the second copper sheet is located on the second surface, the side wall of the heat conducting through hole is attached with a copper film, the first copper sheet and the second copper sheet are connected by a copper film; graphene film, the heat source end of the graphene film is connected with the heating source device, the cold source end of the graphene film covers the first copper sheet and the heat conducting through hole. The technical solution of the utility model can reduce the cost of the radiating system on the printed circuit board, and can solve the problem of heat stress caused by uneven temperature of the whole plate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an electronic device.