The rate of flesh content and nutritional quality of six Esox lucius were measured and compared with some high quality fresh water fishes.The results showed that:the rate of flesh content of E.lucius was 64.8%,the crude protein content and fat content were 19.1% and 1.4% respectively,the total content of 17 amino acids was 17.38%,in which the content of 7 essential amino acids was 8.14%,the content of delicious amino acid was 6.36%.The essential amino acids accounted for 45.73% of the total amino acids,which was lower than egg protein pattern but higher than WHO/FAO pattern significantly.The EAAI was 76.35,the first limiting amino acid was Valine,the second one was Methionine,and the third one was Isoleucine.Based on all of the analyses,it can be concluded that E.lucius was a species of high quality in nutrition.