The invention discloses a method for preparing fishes into a fish instant food with peppermint flavor. The method is characterized in that the food comprises raw materials, seasonings, additives and water, wherein the raw materials comprise fish pieces, corn starch, wheat flour and edible oil, and the seasonings comprise monosodium glutamate, refined salt, ginger powder, illicium verum powder, fennel, pepper powder, and peppermint oil. The processing steps comprise: 1, removing skin and bone from the fish, cutting to provide a spare use; 2, preparing a seasoning liquid, and soaking the fish pieces into the seasoning liquid; 3, preparing a slurry, and mixing the drained fish pieces and the slurry according to a weight ratio of 1-10:1, wherein the slurry comprises the corn starch, the wheat flour, a leavening agent and the water; 4, placing the slurry-coated fish pieces in an oil pan with a temperature of 180 DEG C to fry, and then carrying out quick freezing to obtain the finished product, wherein the temperature is less than -30 DEG C. The fish instant food of the present invention has advantages of simple processing, capability of treatments by microwave, frying, baking, and other manners, convenient taking, and the like. The fish instant food prepared by the formula of the present invention is an instant food with characteristics of unique flavor, crisp taste outside, tender taste inside, delicious meat, rich nutrition, appetite increasing, and adaptation to the modern fast pace.