Abstract: Three kinds of aluminum sludge composite fillers, including aluminum sludge-zeolite, aluminum sludge-steel slag, aluminum sludge-zeolite-steel slag, were prepared by using aluminum sludge, steel slag and zeolite. The physical properties and isothermal adsorption properties of phosphorus were studied. The composite fillers were used in a pilot-scale constructed wetland system, and their purification effects on wetland water quality were discussed. The results showed that the three kinds of composite fillers had higher volume density, porosity and specific surface area compared with aluminum sludge and conventional wetland fillers. The adsorption effect on phosphorus was quite different, with the order as follows: aluminum sludge-steel slag>aluminum sludge-zeolite> aluminum sludge-zeolite-steel slag. The removal rate of COD_Cr was about 70% in constructed wetland which revealed no significant differences. The removal rate of TP, TN and NH₃-N were significantly different; the removal rate of aluminum sludge-steel slag and aluminum sludge-zeolite on TP was higher (above 93%), while that of aluminum sludge-zeolite, aluminum sludge-zeolite-steel slag on TN and NH₃-N was higher (TN above 65% and NH₃-N 77%). The aluminum sludge-zeolite composite filler had the best comprehensive removal effect on pollutants in constructed wetlands, and the effluent quality of constructed wetlands could reach level A of Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB 18918-2002).