Abstract: The rich nutritive value and special taste and flavor of aquatic products enrich people's daily diet.People's demand for aquatic products is increasing day by day.Freezing is one of the methods to preserve aquatic products.Freezing storage is of great significance to the transportation and preservation of aquatic products, but it is easy to be damaged by ice crystals in the process of product freezing, resulting in the deterioration of quality during storage, reducing nutritional value. So aquatic products should use advanced freezing techniques or preservatives to refine ice crystals so that ice crystals are evenly distributed, reducing damage and maintaining aquatic products during storage, and finally achieve to maintain good quality in the mass circulation process.Therefore, in this paper, the new and old contrast of refrigeration technology, the factors affecting the quality of frozen aquatic products and the quality maintenance of frozen seafood were expounded, the development status and achievements of these three aspects were summarized.Finally, the prospect of frozen fresh-keeping technology of frozen aquatic products in the future was put forward, which provided sufficient theoretical basis for the future research on the preservation of aquatic products.