Abstract: The nutritious constituents of Meretrix meretrix Linnaeus both before and after purification were studied in this paper, including ash, moisture content, crude fat, crude protein and amino acid. The results of the experiments showed that the nutritious constituents of the Meretrix meretrix Linnaeus samples hardly influenced by purification expect crude fat. The delicious amino acids such as glutamic acid, asparagines, alanine and glycin, both before and after purification, didn’t have obvious changes. So we got a conclusion that the purification didn’ t have much influence to the nutritious constituents. Even, purification could reduce the number of E.coli and Salmonella. So the purification of seashell is imperative under the situation.

Key words: Meretrix meretrix Linnaeus, purification, nutritious constituents