The utility model discloses a cable threading device which comprises a shell, the inner surface of the shell is fixedly connected with a supporting frame, the upper surface of the supporting frame is movably connected with a rolling column, the inner surface of the shell is movably connected with a rotating rod, and the outer surface of the rotating rod is fixedly connected with a shifting rod; the outer surface of the threaded cylinder is in threaded connection with a fixing ring, the side surface of the threaded cylinder is fixedly connected with an outer movable plate, the inner surface of the outer movable plate is movably connected with an inner movable plate, the outer surface of the outer movable plate is in threaded connection with a fixing bolt, and the side surface of the inner movable plate is fixedly connected with a movable head. By means of the structure, automatic cable penetrating of the cable is achieved, stable thrust is provided for the cable, the cable is made to move forwards rapidly and smoothly in a pipeline, the integrity and performance of the cable in the penetrating process are guaranteed, the construction cost and damage to the surrounding environment are reduced, and the cable penetrating efficiency and applicability of cable penetrating equipment are improved.