Wood anti-cracking agent

The invention relates to a wood anti-cracking agent, which is provided with a core layer and a shell layer coated outside the core layer, and the core layer is prepared from the following raw materials in parts by weight: one or a combination of any two or three of 8-15 parts of salicylanilide, 10-12 parts of silver-loaded nano titanium dioxide or 5-10 parts of nano xylan; the shell layer is prepared from the following raw materials in parts by weight: 80-120 parts of an ethylene monomer, 75-100 parts of a vinyl acetate monomer, 200 parts of water, 2 parts of sodium dodecyl benzene sulfonate and 2 parts of benzoyl peroxide, the anti-cracking agent takes salicylanilide, silver-loaded nano TiO2 and nano xylan as a core, and takes EVA (Ethylene Vinyl Acetate) formed by polymerizing the ethylene monomer and the vinyl acetate monomer as a shell, so that the anti-cracking agent is prepared from the following raw materials in parts by weight: 80-120 parts of an ethylene monomer, 75-100 parts of a vinyl acetate monom