A cable connector and a manufacturing method thereof. The method includes: providing an insulation body, putting a terminal that has a receiving portion into the insulation body, preparing at least one groove on a cable, in which the cable has a first part inserted in the insulation body and a second part extending out of the insulation body, and the groove is provided on the first part, pressing the cable, so that a side edge of the receiving portion pierces the cable at the groove, thereby electrically connecting the terminal and an inner conductor of the cable. The groove enables the terminal to pierce the cable easily, implementing desirable electrical connection between the inner conductor and the terminal, and also stops the cable in the extending direction of the cable, preventing the cable from escaping.