The invention relates to a pneumatic filter unit.The pneumatic filter unit is arranged in the aquarium to filter and purify the water in the aquarium.It includes: a plurality of filters,A gas supply unit and a plurality of filtering biochemical materials；The filters are located in the aquarium.The air supply unit provides oxygen to each filter.The air supply unit provides oxygen to drive the water flow in the aquarium.After the impurities, bacteria and toxic substances in the aquarium are absorbed and driven by filters,The bacteria are attached by a plurality of filter biochemical materials and the water flow in the aquarium is driven by oxygen to continuously roll and self purify.To achieve continuous circulation of water in the aquarium, a plurality of biochemical materials are used to filter and purify the water in the aquarium and provide oxygen in the aquarium.本創作一種氣動式過濾單元，該氣動式過濾單元係設於水族箱內進行過濾淨化水族箱內的水等功效目的，其包含：複數個過濾器、一供氣單元以及複數過濾生化材；該各過濾器係設於水族箱內，該供氣單元係提供氧氣至各過濾器後，藉由該供氣單元提供氧氣帶動水族箱內的水流，經由各過濾器將水族箱內雜質細菌及有毒物質吸附帶動後，在由複數過濾生化材提供細菌依附於上並由氧氣帶動水族箱內的水流持續滾動自淨，達到水族箱內水持續循環流動並由複數過濾生化材進行過濾淨化水族箱內的水並提供水族箱內氧氣。
