The invention relates to an infrared alerting module guide device. A center shaft is fixed at the lower end of a sliding rail seat and is embedded into a matching hole of an inner framework with a small gap; angle scales are respectively arranged on the sliding rail seat and the inner framework; the sliding rail seat and the inner framework are fixed through a fixing pin and a bolt; a sliding rail is arranged at the upper end of the sliding rail seat; an infrared module is fixed on the sliding rail. The infrared alerting module guide device is simple in structure; when the infrared module is damaged, adjustment is not needed, and the infrared module is replaced in real time, so that the maintenance of a system is greatly improved.