The utility model relates to an aluminium-air battery, which comprises a combined type fence anode, a combined tool storage cathode, a circulation flow electrolyte system, an anode lifting and pulling device and a guiding casing, wherein, the combined type fence anode can fix aluminum plates and insulating strips which are arranged abreast and at intervals together by a wrench which is attached with a nut and a bolt. A cathode window of the combined tool storage cathode is fixedly connected with both sides of a tool storage cathode carrier. A circulation pump and a transport pipe of the circulation flow electrolyte system can pump electrolyte and form circulation in working state. The anode lifting and pulling device and the guiding rib of the guiding casing exist in the inner side of the casing and are distributed in a longitudinal direction. A guiding groove is a longitudinal through groove of the side face of the casing.