The invention relates to a polyacrylic ester wood lacquer emulsion and a preparation method thereof. The emulsion comprises a monomer composition, a silicon-containing unit prepolymer, an emulsifying agent, an evocating agent and deionized water. The polyacrylic ester wood lacquer latex is prepared by introducing the silicon-containing unit to the process of emulsion polymerization of monomers such as acrylic acid and acrylic ester type and the like in a simple manner; the technical process of the polymerization way is quite simple, and the preparation cost is relatively low; in addition, during film forming of the emulsion, low surface energy silicon-containing resin can be shifted to paint film surface; as a result, atoms on the paint film surface can be arranged in a compact manner to form a self-stratification structure.