The invention discloses a cable connector with a locking part, which comprises a main body part and a nut in thread connection with the main body part, wherein the nut is provided with a hole suitableto allow a cable to pass through; the connection part of the main body part and the nut is provided with space for accommodating the cable; the main body part is provided with contact pins suitable to be connected with a cable socket; and a locking part is arranged between the nut and the main body part to limit the rotation of the nut on the main body part. The cable connector with the locking part of the invention is provided with the locking part that can ensure that the nut cannot rotate freely after being arranged at a given position on the main body part of the cable connector, ensure that the cable is free from looseness and separation from the cable connector after being installed and ensure the firmness of the cable connector in use.