This paper deals with the basic principle of cryoprotection technology and the current situation of the application in improving frozen aquatic products quality,and introduces cryoprotectants,rinsing craft and the effect of using rinsing pharmaceuticals in detail.The results show cryoprotection technology and rinsing craft are effective to keep frozen aquatic products fresh degree,flavor and prevent freezing denaturation of protein .Offer the theoretical direction for cold working of the aquatic products.