The invention discloses a torsion spring bouncing-type circuit breaker insulated automatic protection device, which belongs to the mechanical field. A lower support is arranged at a static contact end of a switch main body support; a front support is arranged on the lower support; a pilot rope upper fixed pulley and a pilot rope lower fixed pulley are arranged on the upper part and the lower part of the front support respectively; an upper supporting plate is arranged at the upper part of the front support; a protection sleeve rod is arranged at the upper end of the front support; the protection sleeve rod and the upper supporting plate are hinged as a whole via a hinge; the hinge is sleeved with a torsion spring; a static contact protection sleeve is arranged at the head end, corresponding to the static contact position, of the protection sleeve rod; a rope fixing ring is arranged on an operation handle rotation rod; and a rope is arranged, the head end of the rope is fixedly connected with the middle end of the protection sleeve rod, the rope sequentially passes through the pilot rope upper fixed pulley, the upper supporting plate, the pilot rope lower fixed pulley and the main body support, and the tail end of the rope is fixedly wound on the rope fixing ring. A step of removing the protection sleeve and closing the switch and a step of opening the switch and covering the protection sleeve are carried out for achieving automatic protection effects.