Elbow joint replacement prosthesis

The invention relates to the technical field of medical apparatus and instruments, and provides an elbow joint replacement prosthesis. The elbow joint replacement prosthesis comprises an ulna handle and a humerus handle, wherein the ulna handle and the humerus handle can relatively rotate; an ulna liner is installed in the round hole of an ulna handle connecting end; the humerus handle is providedwith two round connecting parts; the inner side of the round hole of each round connecting part is independently provided with a humerus liner; a bayonet lock cover penetrates through the ulna linerand the two humerus liners and is clamped with one humerus liner; a bayonet lock penetrates through the bayonet lock cover; and the front end clamping hook of the bayonet lock is cooperated with the bottom surface of the groove of the bayonet lock cover. The elbow joint replacement prosthesis has the beneficial effects that the ulna handle and the humerus handle are in spherical surface semi-restricted connection, when the