Two experiments were carried out to study the feeding value of barley straw silage for Korean cattle. For the first feeding trial, it was conducted for 100 days to evaluate the growing performance in twenty bulls with 150㎏ body weights and barley straw silage with alkaline treatment was substituted with wheat bran at the level of 10%, 20%, 30% on the dry basis. Far the second feeding trial, it was conducted for 90 days to evaluate the growing performance in 24 bulls with 200㎏ body weights, and barley straw silage was substituted with wheat bran at the level of 20% and 30% on the dry basis. In this trial the alkaline treated straw was once neutralized before the silage. Each experiment also included the treatment which raw barley straw with grinding was replaced for wheat bran at 20% level. The results obtained was summarized as fellows: 1. In the first feeding trial, the barley straw silage group responded favorably over the ground raw straw fed group but shored less body weight gain and the TDN intake was less compared with control group, decreasing as to increase the level of silage incorporation. But it was not significantly differences between control and silage groups. 2. In the second feeding trial, it was resulted in more weight gain and better feed efficiency of the straw silage group over the control (P$lt;0.01). Therefore, the alkaline treated barley straw which was once acid-neutralized before the ensilage was improved over the previous non-neutralized silage.