The common nutrient compositions,minerals and amino acids of Agaricus taeniatus were detected and compared with other mushroom species including the wild Morehella esculenta , Boletus edulis and cultivars Lentinus edodes , Agaricus bisporus . The international general nutritional value assessment method was applied for the overall nutritional evaluation of its protein.The results showed that the content of crude protein in Agaricus taeniatus was 41.6%. The mineral contents were rich in potassium and magnesium,higher than tested species. Agaricus bisporus contained 16 kinds of amino acids (tryptophan was not tested),and the contents of glutamic acid,aspartic acid,alanine accounted for 40% of the total amino acid content. The amino acid score (AAS),chemical score (CS),essential amino acid index (EAAI),biological value (BV),nutritional index (NI) and score of ratio coefficient of amino acid (SRCAA) of protein were 61.47,39.34,65.55,59.75,27.27 and 70.86,respectively. It is indicated that Agaricus taeniatus is a kind of delicious mushroom with high nutritional value.