Fish composite antifreeze agent and application thereof

The invention relates to a fish composite antifreeze agent and a preparation method thereof, and the fish composite antifreeze agent comprises the following raw materials by weight: 0.1-3% of trehalose, 0.1-3% of sodium chloride, 0.1-3% of glycerin, 0.1-1% of sorbitol, 0.01-0.3% of ascorbic acid, 0.01-0.3% of a bamboo leaf antioxidant, 0.01-0.1% of ethylenediamine tetraacetic acid, 1-5% of sodium pyrophosphate, 1-5% of sodium tripolyphosphate, and the balance of water. 0-1% of sodium hexametaphosphate and the balance of water. The surimi composite antifreeze agent disclosed by the invention has a relatively good application effect on fishes with different fat contents, not only can maintain the quality of frozen storage fishes, but also can provide technical support for producing high-quality surimi by using frozen fishes. After 90 days of freezing storage, the gel strength of the minced fillet produced by using the frozen storage fish treated by the fish composite antifreeze agent can be close to that of the