Opening and closing damping brake disc and GIS vacuum switch

The utility model relates to the field of switches, in particular to an opening and closing damping brake disc and a GIS vacuum switch. The opening and closing damping brake disc comprises a disc body and a locking pit on the disc surface. The disc body is located on a certain rotatable piece on a force transmission path from the power source to the switch moving contact and rotates synchronously along with the rotatable piece. And the locking pit is used for being matched with a lifting pin of an external lifting pin mechanism in a locking manner during opening and closing so as to lock the rotatable part. And a damping structure is also arranged on the disc body. And the damping structure is arranged on a relative motion path of a lifting pin of the external lifting pin mechanism relative to the opening and closing damping brake disc, and corresponds to a part of a tail section of a rotation stroke of the opening and closing damping brake disc in an opening and closing process. When the damping structure ro