Abstract:This experiment conducted to compare the differences of growing yak meat nutritional content in different regions，the nearly 4 years old grazing yak in the two regions were selected of Henan county and Gangcha county in Qinghai province.The contents of crude protein，crude fat，ash，dry matter，cholesterol，amino acids and fatty acids of the longest muscle samples were measured and analyzed by using the national standard.Their differences were compared by using principal component analysis（PCA）.The results showed as follows：The two regions of conventional nutrients the crude protein，crude fat，dry matter and cholesterol in the yaks meat have no obvious difference（P＞0.05）.The ash differed significantly among yaks meat samples from different regions（P＜0.01）.In the content of amino acids，the difference of yak in the two regions was significant.For the contents of essential amino acid（EAA），non-essential amino acid（NEAA）and total amino acid（TAA），Henan county of yak meat were significantly higher than that of Gangcha county（P＜0.01）.There was no significant difference between the saturated fatty acid（SFA），unsaturated fatty acid（UFA），monounsaturated fatty acid（MUFA）and polyunsaturated fatty acid（PUFA）in two areas of yak meat（P＞0.05）.However，the contents of SFA and UFA in yak meat of Henan county were slightly higher than that of Gangcha county.In conclusion，The quality of yak meat in Henan county was better than that of yak meat in Gangcha county.Both of them have the characteristics of“high protein，low fat，rich nutrition”，and amino acids and unsaturated fatty acids are abundant.