Aldehyde-resistant interior wall coating only needing brushing once and preparation method thereof

The invention relates to an aldehyde-resistant interior wall coating only needing brushing once and a preparation method thereof. The aldehyde-resistant interior wall coating only needing brushing once is prepared from the following raw materials in parts by mass: water, a pH regulator, hydroxyethyl cellulose, a preservative, a wetting dispersant, a defoaming agent, titanium dioxide, kaolin, calcium carbonate, aldehyde removal powder, a primer emulsion, a finish emulsion, an antifreeze agent and a thickening agent. The aldehyde-resistant interior wall coating only needing brushing once has the beneficial effects that the aldehyde-resistant interior wall coating only needing brushing once is developed by screening various emulsions and auxiliaries and researching a dosage ratio, has the same functions as a primer and a finish paint, is high in covering power and easy to construct, can achieve the effect of forming through only one operation by adopting an airless spraying mode, and has the effects of removing