Abstract: The mechanism of application of coal fly ash in water treatment is discussed，and the progress of water treatment，such as dye wastewater，phenol wastewater，heavy metal ions wastewater，removal of ammonium and phosphate，is reviewed. The modification methods of coal fly ash are introduced from acid-modified，alkali-modified，salt-modified，surfactant-modified，mix-modified and synthesizing zeolite. Finally，the future development of coal fly ash is also presented.

摘要： 阐述了粉煤灰应用在水处理中的作用机理，回顾了粉煤灰在染料废水、含酚废水、重金属离子废水以及脱氮除磷中的应用进展。从酸改性、碱改性、盐改性、表面活性剂改性、混合改性以及合成沸石几个方面，介绍了近几年粉煤灰的改性方法，并对粉煤灰未来的研究方向提出了展望。