The utility model relates to a fish water purification device, which comprises: a plurality of transverse first pipe columns, and a gap between adjacent pipe columns； the first pipe column is carried by at least two longitudinal second pipe columns； a plurality of aquatic plants are planted in the gap, and their roots should pass under the gap； therefore, the root system of the aquatic plants carried goes through the gap and into the water, and the root system of the aquatic plants passes through the gap and enters the water through the gap. It can remove the nutrients and suspended solids in the water by adsorption, and increase the dissolved oxygen, so as to achieve the effect of purifying the water quality and make the ecosystem balance in the water.And it does not need electricity to operate, so as to save electricity and reduce the cost of breeding.一種魚塭水質淨化裝置，包括：多數橫列的第一管柱，且相鄰管柱間存在有一縫隙；所述的第一管柱係由至少兩根縱列的第二管柱所承載；於所述縫隙植栽多數的水生植物，且其根系應穿出於縫隙下方；是以，所承載的水生植物的根系穿出於縫隙下方進入水中，藉由其吸附去除水中營養鹽、懸浮固體，並增加溶氧量，達到淨化水質的效果，使得水中生態系統平衡。且不需電力進行運轉，達到省電、降低養殖成本的效果。
