The invention relates to a preparation method of deep-fried salmon steaks. The preparation method comprises the steps: selecting a high-quality salmon, removing a head, laparotomizing, carrying out slice opening of a fish body, splitting to obtain fish steaks, taking the fish steaks, removing abdominal bones, and thus obtaining raw material; after cleaning, putting into a flavoring liquid for soaking to get tasty; after controlling to remove the liquid and placing in a plate, controlling the oil temperature at 70-80 DEG C, and carrying out low-temperature frying for 2-4 minutes; taking out and cooling at the room temperature; controlling the oil temperature at 150-200 DEG C, and carrying out high-temperature frying for 1-3 minutes; rapidly cooling, packaging, sterilizing, and thus obtaining the finished product, wherein the flavoring liquid is prepared by blending apple vinegar, table salt, monosodium glutamate, high fructose syrup, sorbitol, soy sauce, mirin, a fresh ginger juice, a skipjack extract, a garlic powder, a lemon juice, a fermented glutinous rice juice and water according to a proportion. The preparation method of the deep-fried salmon food is reasonable in procedures and strong in operability; and the deep-fried salmon food prepared by the method has the advantages of rich nutrition, crisp outside, tender inside, unique flavor, fresh and delicious taste and convenient eating.