The total amino acid(AA) content of CBE is 21.99%, among which 40.62x and 54.66% are essential and fresh AA, respectively. Forty kinds of volatile compounds were iden tified after 24 h of hydrolysis, with 2.3,5-trimethylpyrazine as the key flavor compound. After 8 of hydrolysis of CBE, the content of small MW of peptides(400-1000 Da) increased by 7 times compared 1 h. CBE and its hydrolysates demonstrate a new kind of potential suitable nutritional sup with that of plement in various foods.