The invention relates to a film
preservative. The film
preservative is composed of the following components in percentage by
mass: 0.8 to 1.5 percent of soybean
polysaccharide, 0.6 to 1.0 percent of
sodium alginate, 0.2 to 0.5 percent of
citric acid, 0.1 to 0.3 percent of
phytic acid, 3 to 5 percent of a waxberry extract, 5 to 7 percent of a
honeysuckle extract, 0.08 to 0.2 percent of
magnesium salt and the balance of pure water. The invention also relates to a preparation method of the film
preservative and application of the film preservative in preservation of
euphausia superba. Compared with the prior art, the film preservative has the advantages that a film can be formed on the surface of the
euphausia superba so as to inhibit the invasion and the growth of
pathogenic bacteria such as
bacteria and fungi, the decaying deterioration of an
euphausia superba body is prevented, the euphausia superba treated by the film preservative can be stored at the temperature of 0 to 4 DEG C, the taste and the quality of
shrimp meat are guaranteed, and compared with the
storage energy consumption of a conventional low-temperature storage method, the
storage energy consumption of the film preservative is reduced.