The invention provides an electronic tag reading device of an ammeter, which comprises a reader, a shielding case arranged corresponding to the reader, and a driving mechanism for driving the shielding case to move vertically; when the electronic tag is read, the driving mechanism drives the shielding cover to cover the reader and the to-be-tested ammeter so as to read the electronic tag of the to-be-tested ammeter, and when the electronic tag of the electric meter is not read, the driving mechanism drives the shielding cover to reset. The reading device provided by the invention comprises a shielding case; when the electronic tag of the electric meter is read, the electronic tag needing to be read is covered, interference from other ammeters can be shielded, reading of the electronic tagis more accurate, the electronic tag reading device of the ammeter can read the electronic tags of multiple ammeters at the same time, and the reading efficiency of the electronic tags of the ammetersis improved.