High-efficiency nitrogen and phosphorus removal filler for breeding tail water

The invention belongs to the technical field of aquaculture tail water treatment, and particularly relates to efficient nitrogen and phosphorus removal filler for aquaculture tail water. The efficient nitrogen and phosphorus removal filler for the culture tail water comprises the following components: polyurethane sponge for bonding iron powder, magnetite powder and bacillus, and a carbon source. Polyurethane sponge with a large specific surface area is used as a carrier, and the carrier is beneficial to rapid film formation of a biological film; the iron powder carried by the carrier has excellent phosphorus adsorption performance, phosphorus in the aquaculture tail water can be effectively removed, the activity of microorganisms in a biological membrane is improved, magnetite cooperates with the iron powder, and the indirect nitrogen removal function of the iron powder is enhanced; the added carbon source can provide enough carbon for the biological membrane in the oligotrophic aquatic water and provide con