The invention discloses a primary aluminum air battery, and the battery at least comprises a container, a battery pack, a water absorption material, an electrolyte, and an active-type starting device. The battery pack is put in the container, and consists of an aluminum anode and an air cathode. The water absorption material is put around the battery pack in the container. The electrolyte is put in the container, and does not contact with the battery pack. The active-type starting device is provided with a mechanism which enables the electrolyte to actively contact with the battery pack.