Abstract: The nutritional value was analyzed and evaluated by measuring conventional nutrients,amino acids,fatty acids and minerals contents in leg muscles of Rongmao chicken. The results showed that total amount of 17 amino acids in leg muscles of Rongmao chicken reached 78.91%,total amount of essential amino acids was 32.65%,umami amino acids was 27.94%,and medicinal amino acids was 52.72%,essential amino acids/total amino acids was 41.35%,essential amino acids/nonessential amino acids was 70.73%. It was conformed to the amino acid standards recommended by FAO/WHO,and the amino acids composition ratio was balance. The leg muscles were rich in USFA and P,Mg,Ca and so on. There was a significant difference between the different gender and nutritional components of leg muscles of Rongmao chicken(P<0.05). The Rongmao roosters had better amimo acids and fatty acids nutritive value than hens while mineral nutritive value lower than hens. So leg muscles of Rongmao chicken is a kind of meat product that owns the characteristics of sufficient umami,effective nourishing function and high nutritive value. The leg muscles of different gender of Rongmao chicken had different nutritive value characteristics.