The utility model discloses an automatic teller machine (ATM) protection cabin multi-beam active infrared intrusion detector. The ATM protection cabin multi-beam active infrared intrusion detector comprises a controller, two transverse frames, a through-beam emitter which can at least emit three infrared beams, and a through-beam receiver which is matched with the through-beam emitter, wherein the through-beam emitter and the through-beam receiver are symmetrically arranged in an ATM protection cabin through the transverse frames. The ATM protection cabin multi-beam active infrared intrusion detector of the utility model is ingenious in structural design and is reasonably provided with the through-beam emitter which can at least emit three infrared beams, and only when a corresponding number of infrared beams are blocked simultaneously, the through-beam receiver will feed back signals of door locking to the controller, and the controller starts a door lock to perform door locking action, and other people outside the protection cabin can be prevented from entering the protection cabin again; when only one infrared beam or two infrared beams are blocked, the through-beam receiver does not perform processing; and therefore, the ATM protection cabin multi-beam active infrared intrusion detector has excellent anti-jamming performance, and can assist in avoiding automatic locking of the cabin door of the ATM protection cabin, and ensuring the normal use and safety of the ATM protection cabin.