Bionic total ankle joint replacement prosthesis

The invention relates to the technical field of medicine, in particular to a bionic total ankle joint replacement prosthesis which comprises a tibia end three-period minimal curved surface porous structure, a tibia end prosthesis, a talus end prosthesis and a talus end porous structure. The contact surfaces of the tibia end three-period extremely-small curved surface porous structure and the talus end porous structure with the bone are designed to be arc-shaped, so that the excision amount of the implanted bone is greatly reduced, the sclerotin of a patient can be reserved as much as possible, the original sclerotin is less damaged, stress concentration is prevented, and the risk of sinking of the prosthesis is reduced; the three-period extremely-small-curved-surface porous structure is adopted to make contact with the bone, on one hand, the elastic modulus of the contact surface is reduced, osteolysis caused by stress shielding is prevented, on the other hand, due to the fact that the porous structure is ado