The invention discloses a screw structure assembled auxiliary probe for paving a cable in a high voltage cable trench. The auxiliary probe comprises a probe body. An optical lens is arranged in the head of the probe body. A CCD camera is arranged in the middle of the probe body. The CCD camera is connected to the optical lens. The middle of the probe body is provided with a wireless receiver and ahot spot generator. The wireless receiver and the hot spot generator are connected to an external platform to carry out information exchange. The middle of the probe body is provided with a lithium battery. The tail of the probe body is connected to a probe rod. A spring switch device is arranged in the tail of the probe body. The probe rod contacts with the spring switch device. The external side of the probe rod is fixedly connected to a cable. The external side of the probe rod is provided with a guiding support device. The structural design is reasonable, the practicality is strong, whena cable is paved in a high voltage cable trench, the provided auxiliary probe can smoothly fix the cable to the probe rod, the frequency of opening a cable cover plate is reduced effectively, and thecable pavement becomes more convenient.