The invention discloses a method for implanting an electronic tag for identification into a distribution network transformer. The method comprises the steps as follows: identity information of the transformer is assigned to a chip of the electronic tag, and the chip is arranged at the bayonet of the electronic tag; the identity information of the transformer is acquired by an antenna of the electronic tag, and the identity information of the transformer is identified; the electronic tag is fixed by the aid of a mounting box of the electronic tag, and a clamping groove matched with the bayonet of the electronic tag is formed in the mounting box; the mounting box is cast in a transformer body; the electronic tag is mounted in the mounting box cast in the transformer body, the bayonet of the electronic tag is inserted in the clamping groove, and the electronic tag is packaged in the mounting box. With the adoption of the implementation manner, the defect that electronic chips in failure cannot be replaced is overcome, and the local amplification during operation of the transformer is effectively reduced. The probability that a special worker replaces the electronic tag or mounts the electronic tag onto other transformers is avoided, and the electricity stealing probability is decreased.