The invention provides chicken fillets coated with snowflake shaped breaders, and a preparation method of the chicken fillets coated with snowflake shaped breaders. The chicken fillets coated with snowflake shaped breaders comprise the following raw materials of chicken breast, ice water, tapioca starch, distinctive flavored dusting materials, white granulated sugar, onion powder, garlic powder, dietary alkali, chili powder, white pepper powder, meat fragrance enhancing powder, a non-phosphorus water retaining agent, sodium tripolyphosphate, trehalose, biological enzymes and breader slices. The preparation method comprises the following steps of treating raw materials, performing rolling, performing pickling, performing bran wrapping, performing quick-freezing, performing packaging and performing warehousing. A slicing machine and a slitter are perfectly combined for performing preliminary treatment on the raw materials, and the length, the width and the thickness are uniform; and besides, key control points (selection of raw materials, preliminary treatment of large breasts, utilization of the large breasts after preliminary treatment, and oblique angle) are utilized, so that the fibers of the large breast raw materials are not destroyed, guarantee is provided for the perfect mouth feel of finished products, the labor cost is further reduced, and the labor efficiency is improved.