The invention discloses a reconstruction device of a humerus or a thighbone near end. The reconstruction device comprises a prosthesis and a titanium cage, wherein the prosthesis comprises a combined prosthesis head and a prosthesis handle; the titanium cage is arranged outside the prosthesis handle, and the upper end of the titanium cage is connected with the prosthesis head. When the prosthesis is a humerus prosthesis, the prosthesis head comprises a humerus head and neck, and the humerus head and neck is formed by a humerus head and a humerus neck connected with the humerus head; the prosthesis handle comprises a humerus handle connected with the humerus neck; when the prosthesis is a prosthesis on the upper middle section of a thighbone, the prosthesis head comprises a thighbone head and neck, and the prosthesis handle comprises a thighbone handle. According to the reconstruction device, not only can the humerus or the thighbone near end be replaced and shoulder joints or hip joints be constructed, but also reconstruction for the defect after bone tumours of the humerus or the thighbone near end are removed can be achieved, and the reconstruction device is suitable for reconstruction of severely smashed C-shaped fracture conditions of humerus (thighbone) backbone near ends.