The present disclosure discloses an electronic tag and a control method thereof. The electronic tag comprises: a power supply module configured to supply power to the electronic tag; a display module configured to display a display screen required by the electronic tag; an electronic tag circuit configured to control the electronic tag to operate in a state that the electronic tag is powered by the power supply module; and a switch circuit configured to disconnect the power supply module from the electronic tag circuit when the display screen does not need to be updated.