Abstract: Rapid detection technology of the freshness of aquatic product was emphasized. The tissue and structure of Cyprinidae changed with its freshness， the changes of Cyprinidae could be indicated by its texture. The texture of Cyprinidae was explored under 4， 0 and -18 ℃， then the relationship between the freshness of Cyprinidae and its texture was analyzed. The results showed that hardness， flexibility and chewiness of Cyprinidae were related to the freshness. A texture model for evaluating the freshness of Cyprinidae was established by using multiple linear regression analysis， the accuracy and verification accuracy of this texture model for determining the freshness was 91.1% and 85.7%， respectively， So this model could be used to predict the freshness of Cyprinidae.

Key words: Cyprinidae, freshness, texture, model