X-ray high-voltage cables are divided into high-voltage plugs and sockets. The front end of the X-ray high-voltage cables is equipped with three copper pins connected to the sockets. There are wiring holes on the pins for welding the core wires of the cable. The inner end of the plug is inlaid with a copper bell mouth for welding with the metal shielding layer of the X-ray high-voltage cable to form a good grounding. X-ray high-voltage cable plug: its pin is die-casted on the side of the head end of the high-voltage plug, and the root of the pin is provided with a small lead hole for passing the conductive core wire and welding the conductive core wire to the root of the pin In order to match the high-voltage plug, the bottom of the socket of the X-ray high-voltage cable will be provided with three copper terminals matching the high-voltage plug, and each terminal will be provided with a round hole for the pin insertion of the high-voltage plug. There are 3 copper terminals cast on the bottom of the socket of the X-ray high voltage cable. A hole with a depth of 1cm is drilled in the middle of the terminal to make the plug and socket of the X-ray high voltage cable fit well. In order to improve its insulation strength, the gap between the X-ray high-voltage cable and the high-voltage plug must be filled with high-voltage oil. The bottom of the high-voltage plug is also provided with a metal bell mouth, the purpose of which is to improve the electric field distribution of the grounding deduction and prevent the wiring between it and the ground from being too dense.