Abstract: The amino acid composition and content of Haibei yak meat and Datong yak meat were analyzed and evaluated by using bio+ fully automatic amino acid analyzer. The results showed that 17 kinds of amino acids were determined from Haibei yak meat and Datong yak meat,the total amount was 19.4 g/100 g and 18.6 g/100 g;the EAA/TAA of Haibei yak meat was 44.3% and EAA/NEAA was 79.6%. The EAA/TAA of Datong yak meat was 41.4%,and EAA/NEAA was 70.6%. Visible both of the proportion of amino acids is reasonable, nutrition is more comprehensive,is a high quality protein source. Compared with the two, Datong yak meat is superior.

Key words: yak meat, amino acids, quality, analysis