The invention relates to an anti-theft electric meter box. The anti-theft electric meter box comprises a box body, and a hidden chamber, an anti-theft door, a first unlocking mechanism, a second unlocking mechanism and a third unlocking mechanism which are arranged on the box body. The first unlocking mechanism includes a slide slot, a slide plate, a first magnet, and a reed pipe. The second unlocking mechanism includes an electromagnet, a first spring, a first clip, and a security door. The third unlocking mechanism includes a first bolt, a second bolt, a second magnet, a third magnet, a second clip, and a second spring. The box door of the anti-theft electric meter box is not equipped with a regular lock but the three unlocking mechanisms, and the box body can be opened only when the three unlocking mechanisms are activated in turn in the right way. The three unlocking mechanisms are designed to be concealed and delicate, and cannot be activated without knowing the principle. The anti-theft electric meter box has high security performance, and can be unlocked without a key.