The utility model relates to a high-voltage shielding plug. The high-voltage shielding plug comprises a shielding plug, a plug locking nut, a shielding sleeve, a shielding connector, a protection sleeve, a leading wire clamping sleeve, and a clamping nut, the shielding plug comprises a plug shell, an insulation plug, and high-voltage pins, the insulation plug is embedded into the plug shell, the high-voltage pins penetrate through the insulation plug, the plug locking nut is movably arranged at the outside of the shielding plug in a sleeved manner, the shielding sleeve is a metal sleeve, the head of the shielding sleeve is connected with the shielding plug, the tail of the shielding sleeve is fixed with the shielding connector, a wiring cavity is enclosed by the shielding plug, the insulation plug, the shielding sleeve, and the shielding connector, the protection sleeve is arranged at the outside of the shielding sleeve, one section of the leading wire clamping sleeve is threadingly connected with the protection sleeve, and the other section of the leading wire clamping sleeve is threadingly connected with the clamping nut. The high-voltage shielding plug can bear high voltage and high current, the shielding effect is good, high-quality, reliable, and stable operation work state can be obtained by high-voltage power supply host equipment, high-voltage leakage of a detection loop is avoided, and the detection precision is guaranteed.