Abstract: This study aimed to analyze several indexes of Sinonovaculla constricta Lamarck in different populations concerning to nutrition and flavour,including total protein,fat,amino acid,fatty acid,ash,flavour nucleotide,lycine,sugar and myosin and so on.Compared with Sinonovaculla constricta cultivated in autumn,the S.constricta cultivated in spring has more fatty acid,sugar,flavour nucleotide in mantle and myosin.However,total amino acid,essential amino acid,flavour amino acid,total protein,fat and ash come to the inverse disciplinarian.But lycine has no significant differences among these samples.Changjie population cultivated in spring has significant advantage in lycine,total amino acid,essential amino acid,flavour amino acid and flavour nucleotide in foot.The population cultivated in autumn has significant advantage in sugar,fat and myosin.The quality of S.constricta varies due to different cultivations.Regardless of different cultivating seasons,tidal-flat aquaculture is significantly better than pond aquaculture.It was concluded that all the samples can be clustered into the above-mentioned two aquacultures according to clustering analysis.

Key words: Sinonovaculla constricta, fatty acids, amino acids, multivariation analysis