The invention discloses an anti-loosening weak current cable connector. The anti-loosening weak current cable connector comprises a connecting tube and a sleeve tube; a protection tube is fixedly arranged in the connecting tube in a sleeving manner; clamping grooves are formed in the right ends of the upper surface and the lower surface of the connecting tube respectively; a first through hole is formed in the inner surface, corresponding to the positions of the clamping grooves, of the connecting tube; the first through hole is connected with the clamping grooves; a second through hole is formed, corresponding to the position of the first through hole, in the protection tube; an accommodating groove is formed in the inner surface, corresponding to the position of the second through hole, of the protection tube; a pressing plate is inserted in the accommodating groove; and a pressing rod is inserted in the first through hole. According to the anti-loosening weak current cable connector, the pressing plate is arranged in the accommodating groove, and one side surface of the pressing plate is fixedly connected with one end, which extends to the accommodating groove, of the pressing rod; the sleeve tube is screwed to enable inner screw threads to be in threaded connection with second outer screw threads; and a cable can be tightly pressed in the connecting tube by pressing down the pressing plate, so that the problem of easy cable loosening in the existing cable connector can be solved.