Fiber ball filter material is a spherical filter material formed by binding fibers. Compared with the traditional steel filter material, it has the advantages of good elasticity, no floating, large gap, long working cycle and small head loss. During the filtration process, the voids of the filter layer gradually become smaller along the direction of the water flow, which is more in line with the ideal filter material’s distribution of porosity from the top to the bottom, resulting in a fast filtration rate, a large dirt interception capacity, and a good filtration effect, which can be regenerated and used repeatedly.