Mechanically encoded secure radio frequency identification (RFID) passive electronic tag

The invention relates to the technical field of passive electronic tags, in particular to a mechanically encoded secure radio frequency identification (RFID) passive electronic tag. The mechanically encoded secure RFID passive electronic tag comprises a shell and a passive electronic tag system, wherein a mechanically encoding device is arranged inside the shell, connected with a linkage device, and connected with a steel beam self-locking device through the linkage device so as to passively and mechanically generate a new unique sequenced code synchronously at each time when a steel beam self-locks through the linkage between the mechanically encoded device and the steel beam self-locking device; if the self-locked state of the steel beam is unlocked in a burglary manner on the way, and then the steel beam self-locks again after being stolen, a new mechanical code is generated; data read from the passive electronic tag system are compared with the mechanical code, so that whether the self-locked state of the