The invention discloses a method for preparing insect-resistant damp-proof wood veneer. The method includes steps of A, grinding pine bark to obtain pine powder; B, grinding beech shavings to obtain beech powder; C, placing the pine powder and the beech powder into stirring barrels, uniformly mixing the pine powder and the beech powder with each other to obtain first mixtures, adding distilled water into the first mixtures, stirring the distilled water and the first mixtures, and sequentially adding camphor wood powder, mica powder, nanometer aluminum oxide powder and glass fibers into the distilled water and the first mixtures in stirring procedures to obtain second mixtures; D, sequentially adding flame retardants, adhesive and drying agents into the stirring barrels, stirring the flameretardants, the adhesive, the drying agents and the second mixtures and filling the stirring barrels with nitrogen in stirring procedures; E, pouring materials obtained at the step D into molds, carrying out compression molding by the aid of molding machines and carrying out mold release to obtain wood veneer semi-finished products; F, placing the wood veneer semi-finished products obtained at thestep E into drying ovens and carrying out drying treatment to obtain wood veneer finished products. The method has the advantage that excellent insect-resistant effects and excellent damp-proof effects can be realized by the insect-resistant damp-proof wood veneer prepared by the aid of the method.