The invention relates to a white chocolate impregnated food and a preparation method therefor. The white chocolate impregnated food comprises the following ingredients: 3wt%-4wt% of sweet potato flour, 1wt%-3wt% of dietary fibers, 1wt%-3wt% of collagen, 2wt%-3wt% of cocoa powder, 2wt%-3wt% of strawberry jam, 1wt%-2wt% of butter, 1wt%-2wt% of unsalted butter, 15wt%-18wt% of chocolate, 2wt%-5wt% ofwatermelon juice and 52wt%-60wt% of baked pastries. Compared with the prior art, the white chocolate impregnated food has the advantages that the nutrition is rich, the fat content is lowered, meanwhile, a delicate fragrance is added, a tallowy flavor is relieved, the mouth feel of the white chocolate is improved, and the appetite is enhanced; and the impregnation speed can be accelerated, and theefficiency of preparation is increased.