Abstract: This study aimed to assess the nutritional composition, feeding effect and feeding economic benefit of baled oat forage silage on sheep in alpine area. Qinghai Oula-type sheep were grouped and fed with baled oat forage silage, whole-plant corn silage, oat green hay and wheat straw, respectively. Each of the experimental sheep was offered a supplementary concentrate of 0.25 kg/d during the experimental period. All of the sheep were reared in the same feeding and management conditions, and the feeding experiment lasted for 51 days. The results showed that the crude protein content （dry matter %） of baled oat forage silage was increased by 13.77%, 94.23% and 130.13% compared to that of the whole-plant corn silage, oat green hay and wheat straw, respectively; the crude fiber of baled oat forage silage was increased by 52.35% compared to that of the whole-plant corn silage, and was reduced by 11.14% and 26.73% compared to that of the oat green hay and wheat straw, respectively; the average daily forage grass intake of the sheep fed with baled oat forage silage was significantly higher than that of the sheep fed with oat green hay, wheat straw and whole-plant corn silage, which was increase by 130.93% （P〈0.01）, 199.58% （P〈0.01） and 4.28% （P〈0.05）, respectively; the individual daily gain of the sheep fed with baled oat forage silage reached up to 197.35 g/d, which was increased by 10.85% （P〉0.05） compared to that of the sheep fed with whole-plant corn silage, and was elevated by 40.96% （P〈0.01） and 101.71% （P〈0.01） compared to that of the sheep fed with oat green hay and wheat straw, respectively; the individual daily feeding economic benefit of the sheep fed with baled oat forage silage was 1.71 Yuan/d which was 1.17, 0.96 and 0.50 Yuan/d more than that of the sheep fed with oat green hay, wheat straw and whole-plant corn silage, respectively, indicating the increasing rate of 216.67%, 128.00% and 41.32%, respectively. In conclusion, the baled oat forage silage has obvious feeding economic benefit in sheep rearing, and it is worthy of popularizing in alpine area.