Abstract: Contents of moisture, protein, lipid, fatty acids, and amino acids were analyzed in the muscles of small (weight (1.9±0.2)g), large juvenile (weight (72.4±7.3)g) and adult prenant's schizothoracin Schizothorax prenanti(weight (371.8±20.5)g). There were 16.72% of crude protein and 19.88% of poly unsaturated fatty acids (PUFA)in total fatty acids. The essential amino acids accounted for 47.93% of total amino acids, in which glutamic acid was considerably high, reaching about 14.56%.