The invention relates to a sewage treatment agent, which is composed of the following components: cocoic acid diethanolamide, sodium dioctyl sulfosuccinate, aminotrimethylene phosphonic acid, pyrrolidine, glycolic acid, cinnamaldehyde, barium sulfide, piperazine Pyridine, sodium cellulose, polyaluminum chloride, polyferric chloride, sodium edetate, ammonium aluminum sulfate, polyaluminum sulfate, montmorillonite powder, attapulgite powder, sodium tartrate, sodium borate, amyl acetate , ether, citric acid, sodium cumene sulfonate, o-tert-butylphenol, sorbitan oleate, hydroxyethylethylenediamine, diacetone acrylamide, phosphate, trimethylolpropane, tetratitanate Butyl esters, hydroxyethylcellulose, deionized water. The product of the present invention has a fast reaction speed and no toxic and harmful gases are produced during the process; the product after the reaction is stable and will not be decomposed into toxic substances; it is highly efficient and non-toxic, safe for the human body before and after the reaction, and has no corrosion on objects; it is aimed at sewage treatment efficient.