Abstract: Penaeus vannamei was selected to study the correlation between the freshness of shrimp and its color and texture. The color and texture of Penaeus vannamei at different storage time under 4 ℃and-3 ℃ were tested， and total volatile basic nitrogen （TVBN）， sensory evaluation were measured at the same time. Data was analysed by Fisher linear discriminant， and a color difference model， a texture model and a comprehensive model were established for assessing shrimp freshness. The results showed that the accuracy of the color difference model and texture model was 87.1% and 92.9%， respectively， and the accuracy of the comprehensive model was 98.4%. Thus， the accuracy of the comprehensive model was higher than the others.

Key words: Penaeus vannamei, freshness, texture, color difference