Water-based paint composition and preparation method thereof

The invention provides a water-based paint composition. The water-based paint composition comprises the following components in parts by weight: 30-50 parts of film-forming substances, 26-40 parts of pigment filler, 0.3-0.5 part of HASE hydrophobic dispersing agent auxiliaries, 1.0-2.0 part of water-based fine oxidized polyethlene wax emulsion, 0.3-1.0 part of fluorine-containing surfactant, 1.0-2.0 parts of cosolvent, 1.0-2.0 parts of coalescing agents, 2.0-3.0 parts of other auxiliaries, and acceptable amount of water. Pigment volume concentration of the water-based paint composition is 30%-50%. A paint film formed by the paint composition is better in water-oil amphiphobic effect, beneficial to improving quality of an interior-wall paint product; meanwhile, a novel application field is developed, high environment-friendly requirements are combined with high-quality anti-staining characteristic, so that the product can serve for the interior decoration market better.