Based on samples collected from Yichang segment of the Yangtze River,the nutritional composition in muscle of Coreius heterodon was analyzed.The results showed as follows: The flesh ratio of C.heterodon was(68.13%;) the content of moisture in muscle was 69.58%;the content of crude protein,crude fat,ash,Ca,and P in dry matter was 72.98%,17.10%,5.14%,0.64% and 1.14% respectively.In dry matter the total content of amino acids was 62.27%;the percentage of essential amino acids,delicious amino acids in total amino acids was 42.90%,44.05% respectively.The essential amino acids index(EAAI) of C.heterodon was 71.23.