This experiment was designed to study the effect of carbohydrate sources with some different processes on the utilization of amino acids in the intestine as well as amino acid flow at the abomasum. The carbohydrate sources were cracked corn, whole barley, rolled barley and steamrolled barley, and the 20% of total nitrogen was replaced by the urea. The results obtained are as follows; 1) For the quantities of TAA-N, EAA-N and NEAA-N passing the abomasum, it resulted not significantly in increased for the steamrolled barley diet. The amounts of TAA-N and NEAAN digested postruminally were significantly lower at the feeding of cracked corn diet (P$lt;.05). The mean values for the proportionate disappearance of apparently digested TAA-N, EAAN, and NEAA-N within the intestine for four diets were 79.74±2.53, 79.23±2.40, and 80.62±2.91, respectively. 2) There were no significant differences (P$lt;0.5) for individual amino acid composition (g/100g DM digesta) in abomasum. There were significant differences for the quantities of amino acid passing abomasum on the GLU, PRO, VAL, LEU, PHE, LYS, and ARG at the feeding of steamrolled barley (P$lt;.05). The amounts of each amino acid in abomasal digesta, expressed as a proportion of the amounts ingested for the diets, showed that there were net gains of EAA with exception of cystine and NEAA. 3) Within the intestine of sheep, there was significant loss of amino acids, such as SER, GLU, GLY, ISL, LEU, PHE, LYS (P$lt;.05), and PRO, VAL, and ARG (P$lt;.01). The mean values of the proportionate losses of methionine and phenylalanine were 0.748±0.015, and 0.805±0.032.