Abstract: A method for preservation of fish consists in that the original product is salt-cured and held, whereupon the fish is given a protective coating of a polymer composition containing polyvinyl alcohol, a mixture of poly-hydroxyethyleneglycol ethers of monoethanolamides of synthetic fatty acids of the C.sub.10 -C.sub.16 fraction, sorbic acid, glycerol and water, the mass percentage content of the components of said polymer composition being as follows:______________________________________ polyvinyl alcohol 0.1 to 25.0 mixture of polyhydroxyethyleneglycol 0.00024 to 0.06 ethers of monoethanolamides of synthetic fatty acids of the C.sub.10 -C.sub.16 fraction sorbic acid 0.01 to 4.0 glycerol 10 to 15 water to make up 100, ______________________________________whereupon the thus-obtained coated fish is treated with an aqueous modifying solution of the following mass percentage composition: ______________________________________ modifier 1 to 25 water to make up 100.