Insulation isolation cover of low-voltage knife fuse switch

The invention discloses an insulating isolation cover for a low-voltage knife-type fuse switch. The insulating isolation cover comprises a cover body; the cover body comprises two side plates, a top folding plate, two rotating rods and a top plate locking block; the top folding plate comprises two top plates which are rotatably connected; the two ends, in the rotating radial direction, of the top folding plate are rotationally connected with the two side plates correspondingly. Sliding rails are arranged on the front end surfaces of the two top plates; the top plate locking block is slidably arranged on the sliding rail, and the length of the top plate locking block is smaller than that of the sliding rail. The top plate locking block is used for limiting rotation of the two top plates when the sliding rails of the two top plates are connected at the same time. The first ends of the two rotating rods are rotationally connected with the front end surfaces of the two side plates respectively; a semicircular hol