Fresh-keeping agent for cuttlefishes

The invention relates to a fresh-keeping agent for cuttlefishes, and belongs to the technical field of fresh keeping of foods. The fresh-keeping agent for cuttlefishes, consists of the following substances in parts by weight: 0.3-0.4 part of sodium tripolyphosphate, 0.3-0.5 part of glutamic acid, 0.03-0.05 part of proteases, 0.02-0.04 part of sodium alginate, 0.3-0.4 part of alanine, 0.2-0.5 part of aloe, 0.6-1.2 parts of chitosan, 1-2 parts of glycerine, 12-15 parts of a Chinese prickly ash extract, 4-8 parts of a bunge pricklyash leaf extract, and 40-55 parts of bamboo vinegar. After the cuttlefishes are preserved with the fresh-keeping agent, the cooking mouth feel is good, the fresh taste is hardly reduced, protein is hardly denatured, the nutrient content is not reduced, and the fresh-keeping solution is non-toxic and harmless. Components in the fresh-keeping agent can also regulate the taste of the cuttlefishes. The fresh-keeping agent disclosed by the invention is low in cost and good in fresh-keeping effect, can effectively restrain rancidification of fat in the low-temperature preservation process, and can notably prolong the shelf life of the cuttlefishes.