The invention relates to seasoning baked marine products, and particularly relates to a dried sweetfish which is unique in taste, fresh, sweet, fragrant, and rich in nutrition. The amounts of added condiments comprise sweetfish slices, glacial acetic acid, salt, sugar, an improved natural spice, monosodium glutamate, citric acid, malic acid, mirin, soybean sauce, and a sorbitol powder. A preparation method comprises the steps: firstly, rinsing with clean water cleanly, then taking fish meat, removing fishbones, seasoning according to the above formula; and 24 hours later, laying the slices, drying, baking, and flaking. The dried sweetfish has the advantages of pure taste, rich nutrition and attractive color and luster.