The utility model provides a lift -cabin door sword restraining device, includes base, double -screw bolt, spring and door sword support, the base be the channel -section steel structure, the base both sides respectively are equipped with two through -holes and are equipped with the axle sleeve in the through -holes, respectively are equipped with a double -screw bolt between relative two axle sleeves, double -screw bolt overcoat has the spring, the both ends of double -screw bolt are equipped with the hexagon nut fastening, and one of them is served AND gate sword support and links to each other, and a door sword support is including the inner support and the outer support that are the channel -section steel structure, and interior mount wide is less than the outer support, and the lateral wall of both one sides is laminated mutually and is passed through the hexagon nut fastening that links to each other with the double -screw bolt, and the AND gate sword offsets between two lateral walls of both opposite sides. Compared with the prior art, the utility model apparent advantage and beneficial effect have: utilize one set of door sword restraining device to realize the action of restriction door sword lock hook, accord with new standard requirement, neither influence the action of opening the door, and simple structure and practical, light in weight, resources are saved.