As petrochemical, plastics and other industrial development, more and more factories discharge waste water containing aromatic compounds, this kind of wastewater pollutants stable structure, refractory, at present, aromatic organic wastewater treatment method of the main reagent advanced oxidation and liquid membrane separation technology, although the former is easy to operate, fast reaction, but high operation cost, less in the domestic application; The liquid film used in the latter is easy to age, but there are also membrane pollution and expensive problems.The significant effect of defoaming powder treatment on wastewater mainly depends on the structure and properties of wastewater:(1) unique pore structure and large specific surface area;(2) surface functional groups OH -, H - O - H, Si - O are active;(3) natural hydrophobicity and lipophilicity;(4) chemical stability. The modification methods of defoaming powder used in water treatment mainly include surface covering modification, mechanical grinding modification, ultrasonic treatment and acidification modification. After modification, the specific surface area of defoaming powder increases, the surface activity increases and the adsorption performance improves, so it can be used to treat wastewater.