Electromagnetically-driven extensible prosthesis

The utility model provides an electromagnetically-driven extendable prosthesis. The electromagnetically-driven extendable prosthesis comprises an extendable prosthesis body and an in-vitro electromagnetically-driven controller, specifically, the prosthesis part is composed of a moving body, a rotating body, a sealing shell, a transmission box, an annular permanent magnet and the like. The in-vitro electromagnetic driving controller is composed of a plurality of sections of electromagnetic modules which are connected through flexible materials, and parts such as coils and Hall elements are arranged in the electromagnetic modules. According to the utility model, when the prosthesis is implanted in one operation and is lengthened again, the in-vitro electromagnetic driving controller is worn at the corresponding position of the permanent magnet of the leg prosthesis to generate an alternating electromagnetic field to drive the permanent magnet to rotate and drive the rotating body to rotate so as to push the mov