Protector with negative Poisson's ratio effect

The utility model discloses a protective tool with a negative Poisson's ratio effect. The protective tool comprises a protective ring part and a liner. And the retainer part is provided with a periodic hole structure. The protector liner is composed of a concave honeycomb structure, and the upper wall and the lower wall of each concave honeycomb cell element are provided with periodic hole structures. By means of the design of the protection ring part, the comfortable wearing effect can be achieved, the acting force on the legs or the arms is reduced, and the protection ring can expand outwards under the action of tensile force and is convenient for a user to put on and take off. By means of the structural design of the liner, the compression resistance of the liner can be improved, the liner can be well attached to the body, and the influence caused when a user moves is reduced. While the protective area of the protective tool is increased, the manufacturing process is simplified, andthe protective tool inte