An exemplary printed circuit board includes a main body and a fixing component. The main body includes a first signal layer, a grounding layer, a power layer, and a second signal layer, arranged in that order. A through hole is defined on the main body, and includes a latching hole and a connecting hole. The latching hole is defined by and extends through the first signal layer. The connecting hole is defined by and extends from the second signal layer to the grounding layer, and communicates with the latching hole. The fixing component passes through the through hole, and thereby forms a direct connection with a grounding point of an electronic device.