To make up $quot;the Composition of Korean Feedstuffs$quot; published in 1981, investigation was carried out for digestible nutrients of feedstuffs using Native Cattle. The results obtained from 1981 to 1983 are as follows As compared with the results of the composition of Korean Feedstuffs (1981), it was found that DCP values of rye silage and mixed grass hay were lower and TDN values were higher, but DCP value of wheat bran is slightly higher. It was also shown that fresh hay have a better quality but corn hull not than those presented each by the Composition of Korean Feedstuffs (1981). More retrial for corn stalk without ears, corn grain, and wheat bran is required because digestiblities of dry matter in corn stalk without ears and corn grain and crude fiber in wheat bran were unexpectedly low.