Abstract: Purpose: To systematically determine the nutrients and quality of wild Sarcodon aspratus. Method: the nutritional values and ingredients of S. aspratus were examined and evaluated according to the national standards. Results: The contents of crude protein, crude fiber, crude fat, ash, crude polysaccharide and water in dry Sarcodon aspratus sample were 15.74%, 4.72%, 2.57%, 9.56% and 7.83%, respectively. The contents of mineral elements Mg, Mn, Fe, and Zn were 751.55, 33.76, 318.07, 116.77 mg/kg, respectively. The essential, non-essential, and total amino acids were 3339.85, 6548.98 mg/100 g and 9888.83 mg/100 g, respectively, and the amino acid score (AAS), chemical score (CS), and essential amino acid index (EAAI) were 7.62, 3.92 and 48.46, respectively. Additionally, EAA/TAA and EAA/ NEAA were 33.77% and 51.00% and the flavour amino acid content was 36.68% in the total amino acids. Crude polysaccharide extracted from Sarcodon aspratus was mainly composed of two fractions, of which the molecular weights were determined by gel permeation chromatography (GPC) to be 765747 D and 11194 D, respectively. Conclusion: S. aspratus, with high protein, low fat, and rich in carbohydrates and mineral elements, is of good economic value and has great potential to be developed.

Key words: Sarcodon aspratus, nutrition components, amino acid score