The invention discloses a method for storing white shrimps by using a film coating preservative in combination with an ice-temperature technique. The process flow of the invention comprises the following steps: 1, shocking and inactivating the white shrimps by crushed ice, cleaning the white shrimps by clean water, draining the white shrimps, and then coating the film coating preservative on the white shrimps; and 2, storing the white shrimps at the ice temperature which is between 2.2 DEG C below zero and 0 DEG C. The preservative consists of 4-hexylresorcinol, citric acid, ascorbic acid, chitosan, glacial acetic acid and water, wherein the mass of the 4-hexylresorcinol, citric acid, ascorbic acid and chitosan account for 0.005 to 0.015 percent, 1.0 to 2.0 percent, 0.5 to 2.5 percent and0.8 to 1.5 percent of the mass of the preservative respectively, the glacial acetic acid accounts for 0.8 to 1.2 percent of the volume of the preservative, and the balance is water. By the combination of the film coating preservative and ice-temperature technique, the shelf life of the white shrimps is prolonged by 1 to 2 times compared with that of the white shrimps frozen at a temperature of 4 DEG C.