The utility model discloses a rectangular conductor fixing device, connect into the fixed plate by bent plate and bed plate, the bent plate is the U -shaped, the end of U -shaped is equipped with the perforation, the bed plate is equipped with the connecting hole, locking tooling hole, the welding position hole, rectangular conductor A, B punches on the rectangular conductor, it passes rectangular conductor A to add spring washer A by hexagon head bolt, hole on the rectangular conductor B, it adds the plain washer behind the connecting hole to pass again, hexagon nut fastens for the spring washer B, the screw passes the back of perforating and connects the fastening insulator. The utility model discloses simple structure, simple to operate, the commonality is high. The homoenergetic realizes that reliable overlap joint is with fixed between the inside rectangular conductor of miniaturized switchgear and between rectangular conductor and the equipment.