Safe puncturing device for cable

The utility model discloses a safe puncturing device for a cable, and the device comprises a hydraulic power unit, a puncture needle, and a cable fixing clamping tool. The hydraulic power unit comprises a piston rod. The puncture needle is disposed in a pre-grounding manner and is connected with the piston rod through an insulating push rod. The puncture needle and the periphery of the insulating push rod are respectively sleeved by an insulating guide sleeve. Two ends, corresponding to the insulating push rod, of each of the insulating guide sleeves are respectively provided with steps. The periphery of each of the steps is provided with an insulating sleeve tube through a fixing sleeve. The cable fixing clamping tool comprises a fixed frame which consists of a top plate, a base plate, and side support frames. The base plate is hinged to one of the support frames. The base plate is fixed with the other support frames through fastening bolts. The top plate is provided with a puncture hole. One end, correspond