Passive anti-metal electronic tag and identification system

The invention discloses a passive anti-metal electronic tag and an identification system. When the electronic tag is in use, the electronic tag is arranged on the surface of a metal product, so that when an electronic tag read-write device sends a radio frequency signal to the electronic tag, the information of the metal product stored by the electronic tag is fed back to the electronic tag read-write device. The electronic tag comprises an antenna unit and an electronic tag chip, the antenna unit comprises a first antenna, and the first antenna is electrically connected with the electronic tag chip and used for receiving radio-frequency signals, converting the radio-frequency signals into induction current and providing the induction current for the electronic tag chip; the electronic tagchip is used for storing product information and returning the product information to the electronic tag read-write device through the antenna unit under the energy of the induction current; the plane where the first antenna