Through research and improvement of metal-air batteries, aluminum-air batteries with a "sandwich" structure have been produced. This project uses cheap aluminum metal as electrodes and explores and finds electrolyte materials and electrolyte storage materials which are the most effective and common in life, such as face towels, sanitary products, compressed mask materials, etc. Its aim is reducing costs and paying attentionto practicality. While generating electricity, the raw water is initially treated to achieve the water purification effect (effectively remove SS and TP), so that it has the foundation for the expansion of the concept of water treatment. The separator material after the power generation reaction becomes a fireproof material, which makes the battery have practical applications and research significance.