As one of the key products of the whole wood custom home, the study of environmental protection coating technology for wood wallboard has practical significance. Waterborne acrylic acid (WAA), as an important research object of environmentally friendly coatings, has been studied mainly in the area of modification. However, there is less research on its application to the field of wood wallboard. Herein, we developed a facile strategy to prepare WAA resin coatings with excellent performance using SiO₂ nanoparticles as modifiers and explored the feasibility of wood wallboard. In this work, a simple mechanical compounding method was used to modify the WAA resin coatings by adding nano-SiO₂, aiming to improve their physicochemical properties such as hardness and abrasion resistance while maintaining gloss. It was found that nano-SiO₂ showed different effects on the viscosity, gloss, adhesion, and abrasion resistance of WAA resin coating. The combined performance results showed that the wood wallboard finishes exhibit excellent performance when the modifier nano-SiO₂ was added at 1 wt% in the WAA resin coating. This present work shows that the nano-SiO₂-modified WAA resin coating for wood wallboard has a broad application prospect.