The invention relates to an insulated and enclosed bus bar and in particular relates to an installation structure for the insulated and enclosed bus bars. The installation structure for the insulated and enclosed bus bars comprises the insulated and enclosed bus bars connected to a wall body; a hoop is arranged outside the insulated and enclosed bus bars and is provided with a hoop bracket; a fixing plate is fixed on the wall body and connected with an angle steel bracket; the hoop bracket is fixed on the angle steel bracket by means of a fixing device; the fixing device comprises a screw, on which a spring is arranged; a support spring chute is formed in one end of the spring and is fixed on the hoop bracket by means of bolts. By adopting the installation structure, the non-tightness at the joints of the bus bars can be avoided, the increasing of contact resistances at the joints is prevented, conductive copper bars are prevented from being heated and oxidized and the accident potential is prevented.