The invention relates to shielding hardware and a disconnecting switch using the shielding hardware. The shielding hardware at the movable side and the shielding hardware at the static side are mounted on top flange plates of corresponding pillar insulators in the disconnecting switch via insulator through holes, and an internal cavity of each shielding hardware completely envelops the top flange plate of the pillar insulator and an upper conductor arranged on the top flange plate in a conductive connection manner. The shielding hardware at the movable side is provided with a connecting rod through hole of an operation mechanism, the upper end of the connecting rod of the operation mechanism penetrates the connecting rod through hole, and to ensure contact connection of movable and static contacts, hardware bodies of the shielding hardware at the movable and static sides are respectively provided with moving contact through holes through which moving contacts penetrate. After that the shielding hardware envelops the top flange plates of the corresponding pillar insulators and the conductors at the corresponding sides completely, the electric field intensity is concentrated in the edges of the through holes, and the internal electric field intensity of the shielding hardware is 0, arc-shaped flanging edges arranged at the edges of the through holes reduce the electric field intensity in the hole edges effectively, and the electric field intensity in the upper portion of the whole disconnecting switch is reduced.