Preparation and application of high-efficiency paint mist coagulant

The invention relates to a paint mist coagulant. The paint mist coagulant has good anti-adhesion and coagulation effects on water-soluble and fat-soluble paints and is particularly applied to circulating water treatment of a wet paint mist removing system. The paint mist coagulant comprises an anti-adhesion agent A, a flotation agent B and a regulator C which are used simultaneously, wherein the anti-adhesion agent A is formed by combining water-soluble quaternary ammonium cationic polymer, amphoteric metal salt or polymer of the amphoteric metal salt, and a surfactant, has high electrical neutralization property, can quickly neutralize paint particle charges, and coats paint particles to make the viscosity of the paint particles lost; the flotation agent B is anionic polymer with the molecular weight of 8,000,000 to 25,000,000, has a strong coagulation effect, and can aggregate the paint particles of which the viscosity is lost; and the regulator C is used for regulating the pH of circulating water, controls the pH value of the circulating water to be between 7 and 10 commonly, and has small using amount. The paint mist coagulant is low in price, the process is stable, the total sewage discharge amount is small, and continuous production can be ensured.