In this paper,nutrients of akami muscle of two tuna( Thunnus albacores,Thunnus alalunga) were analyzed and evaluated. The results show that: 1) the moisture content of T. albacares and T. alalung was 72. 43%,72. 73%; fat was 0. 54%,0. 19%; protein was 25. 21%,26. 63%; ash was 1. 32%,1. 53%. The akami of two tuna all had rich content of mineral element. 2) The akami of T. albacares and T. alalung had higher content of polyunsaturated fatty acids,especially DHA content can be as high as 28. 84%,29. 83%. 3) The akami of T. albacares and T. alalung had a reasonable amino acids ratio. Essential amino acids content was 40. 70%,41. 70%,and EAAI was 92. 62,94. 97. It was rich in flavor forming amino acids,the content was 40. 81%,42. 31%. Therefore,the akami of two tuna had higher protein content and low fat content and were very nutritious.