A cable connector assembly includes: a shielding shell; an inner circuit board received in the shielding shell and defining a number of grounding pads; a cable electrically connecting to the inner circuit board, the cable including an outer boot, plural pairs of differential signal wires, and a number of grounding wires each corresponding to a respective pair of differential signal wires; and a grounding plate electrically connecting with the grounding pads; wherein the grounding plate includes a number of arcuate walls each having a respective receiving room accommodating a corresponding pair of differential signal wires, a notch is defined on a top of each of the arcuate walls, and the grounding wire is soldered in the notch.