Passive wireless medical foot brake

The utility model discloses a passive wireless medical foot brake which comprises a pedal structure and a reader-writer, the pedal structure comprises a pedal plate and a base, the pedal plate is arranged on the base, one end of the pedal plate is hinged to the base, a reset mechanism is arranged at the bottom of the pedal plate, and the front end of the other end of the pedal plate is an electronic tag installation face. An electronic tag is detachably attached to the electronic tag mounting surface; a metal shielding cavity and a transparent display window are respectively arranged on the electronic tag mounting surface, corresponding to the pedal plate, of the base from top to bottom; the reader-writer is arranged towards the transparent display window, and when the pedal is in a free state, the electronic tag is located at the metal shielding cavity and shields signals; and when the pedal plate is treaded down and is in a press-fit state, the electronic tag leaves the metal shielding cavity and moves to t