Ear tag device

The utility model relates to the technical field of animal husbandry equipment, and particularly discloses an ear tag device which comprises a box body, a first electric push rod and a nail head which are arranged in the box body, a nail hanging opening formed in the side wall of the box body, and rotating doors symmetrically arranged along the axis of the first electric push rod and located between the first electric push rod and the nail hanging opening. The main label box and the auxiliary label box are sequentially arranged on the outer wall of the box body from top to bottom, the supporting plates are arranged at the bottoms of the main label box and the auxiliary label box respectively and are flush with the rotating door and the bottom face of the box body in height, through openings are formed between the side wall of the box body and the supporting plates, and the pushing frame is used for synchronously pushing the main labels and the auxiliary labels on the supporting plates to the positions below t