The invention provides a processing technology of small baked saury slices. The processing technology comprises the following steps: raw material acceptance inspection, raw material unfreezing, scaling, primary disinfection, head and viscera removal, slicing, inspection after slicing, belly thorn removal, secondary disinfection, thorn touching inspection, salt burying, salt leaching, primary ripening, vinegar soaking, secondary ripening, baking, freezing, slicing and placing in a plate, inspection, vacuumizing, freezing, product inspection, metal probe passing, boxing and re-weighing, box sealing and packaging, and warehousing and refrigeration. The whole processing technology of small grilled saury slices is carried out at low temperature, so that the freshness of the raw materials is ensured, the reproduction of microorganisms is inhibited, and the quality of the saury fillets is ensured; and the quick-freezing treatment effectively inhibits the growth of harmful microorganisms and passivates enzymes, so that the safety and sanitation of the fillet are ensured. The making method of the fish slice is reasonable and strict in process, high in operability, suitable for industrial production and high in making efficiency, and the made fish slices are safe, sanitary and stable in quality.