The invention relates to an insulator shielding cover, which comprises a body part and a wind shielding part, wherein the body part is used for being covered and arranged on an insulator; the body part comprises a top wall and a side wall downwards extending from the top wall; a first opening is formed in the side wall and is used as a window for operating the insulator; the window shielding partis movably arranged on the body part and is used for shielding or at least partially exposing the first opening. The insulator shielding cover can conveniently and flexibly provide operation spaces for operators; the shielding cover does not need to be integrally dismounted or moved; on one hand, the completeness of the insulation shielding can be ensured; on the other hand, the work load of operators can be favorably reduced, so that the operation efficiency is improved.