The invention relates to a high-efficiency sewage treatment agent, which is composed of the following components: non-ionic polyacrylamide, phosphonocarboxylic acid copolymer, polymaleic acid, acryloyloxyethyltrimethylammonium chloride, piperidine, formazan Amidine, Benzalkonium Bromide, Sodium Benzoate, Coconut Shell Charcoal Powder, Sodium Alginate, Ferric Chloride, Potassium Chloride, Vermiculite Powder, Bamboo Charcoal Powder, Sodium Metasilicate, Sodium Laureth Sulfate, Perillaldehyde , sodium nitrite, capric aldehyde, glycerin diacetate, ethylenediamine, tert-butanol, benzoin diethyl ether, glycerol monothioglycolate, o-tert-butylphenol, sorbitan oleate, hydroxyethyl ethylene glycol Amines, Diacetone Acrylamide, Phosphates, Trimethylolpropane, 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.