Abstract: Amino acid and fatty acid composition assay were analyzed by comparing yak meat with airing yak meat, and the nutritional value of airing yak meat was evaluated.The results demonstrated that there were eighteen kind of amino acid and sixteen kind of fatty acid in both yak meat and airing yak meat, the total content of amino acid and fatty acid in airing yak meat is higher than yak meat by 1.34g/100g dry matter and 0.62% (p < 0.05) .The content of amino acid in airing yak meat was 81.14g/100g dry matter, EAA/TAA was 39.45% , EAA/NEAA was 65.15%.The total content of fatty acid was 97.97% , P: S was 0.32, close to ideal pattern, n-6: n-3 was 1.4, in the ideal range.So airing yak meat was a great source of high quality with unique flavor, and a kind of meat product with balanced fatty acid nutritional value.