Abstract: The amino acid composition and nutritional evaluation of 7 brands sweet sauces were analyzed using an automatic amino acid analyzer.But before that, the sweet sauces had been treated by acid andalkaline.The results showed that the average content of total amino acids was 59.5mg /g, of Glu was 19.6mg /g and of Pro was 5.6mg /g. All of these samples contained all kinds of essential amino acids, however there was a difference between the proportion of essential amino acids of 7 brands sweet sauces and of the recommendation of WHO /FAO. The pattern of sweet sauces essential amino acids hardly met the human-beings requirement. The first limited amino acid was Trp.The second limited amino acid of CongBanLv sweet sauce was Met + Cys, and of the other 6 brands of sweet sauce was Lys.The different brands sweet sauces had some differences composition of amino acid.