The present application provides a cable
electrical connection device, which includes a connector, a flat wire and a grounding sheet. The flat wire is connected to the connector, and one end of the flat wire defines a
soldering end. The flat wire includes an insulating body, a plurality of conductive cores, a shielding layer and an insulating layer. The conductive cores are embedded in the insulating body, one end of each of the conductive cores protrudes from the
soldering end and is soldered to the connector, and the plurality of conductive cores includes a grounding core. The shielding layer is wrapped outside the insulating body. The insulating layer is wrapped outside the shielding layer. The shielding layer protrudes from the insulating layer at the
soldering end to form a grounding portion. The grounding sheet includes an attaching portion and a grounding claw. The attaching portion is attached to the outside of the grounding portion of the shielding layer. The grounding claw extends from one side of the attaching portion and is electrically connected to the grounding core.