Passive wireless medical foot brake and control method thereof

The invention discloses a passive wireless medical foot brake and a control method thereof. The passive wireless medical foot brake comprises a pedal structure and a reader-writer; the pedal structure comprises a pedal and a base; the pedal is arranged on the base, one end of the pedal is hinged to the base, a reset mechanism is arranged at the bottom of the pedal, and the front end of the other end of the pedal is an electronic tag mounting surface; 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 sh