Anti falling device is a kind of protective product. It can quickly brake and lock the falling objects within a limited distance. It is suitable for the safety protection when the crane is lifting to prevent the accidental falling of the lifted workpiece. It can effectively protect the life safety of ground operators and the damage of the lifted workpiece. It is used in metallurgy, automobile manufacturing, petrochemical industry, engineering construction, electric power, ship, communication, pharmacy, bridge and other high-altitude workplaces.