The floating bed type fully automatic filter is a new type of water filtration equipment, integrating a new design concept and using the latest patented technology to develop a new generation of water treatment equipment. The product adopts the working mode of countercurrent filtration and pressure-free downstream regeneration in view of the suspension characteristics of the filter medium used, solving the problems of easy clogging of traditional filter equipment, poor medium regeneration effect, high white water consumption, and large sewage discharge. At the same time, the volume and weight of the filter equipment are greatly reduced compared with quartz sand, multi-media and other granular filters.