Discharge gap blocking device for main transformer neutral point lightning arrester test

The utility model provides a discharge gap blocking device for a main transformer neutral point lightning arrester test, which comprises a pressing sleeve, a pressing block, a screw rod and an operating rod, and is characterized in that an electrode bar of a discharge gap is sleeved by a voltage-sharing sleeve, the voltage-sharing sleeve has excellent insulativity, and the operating rod is rotated on the ground to drive the screw rod to rotate, so that the discharge gap is blocked. Further, the screw rod drives the pressing block to move upwards equivalent to the voltage-sharing sleeve, so that the upper surface of the pressing block and the interior of the top of the cavity of the voltage-sharing sleeve clamp the electrode bar, and the voltage-sharing sleeve stably wraps the top of the electrode bar, so that the breakdown voltage of the discharge gap is increased to be higher than the test voltage under the condition that the distance of the discharge gap is not changed; an electrode bar or a connecting piec