Abstract: In order to explore the effects of feeding roughage on growth and development, serological indexes, antioxidant and slaughter performance of newborn male lambs of Boer×Huai goats. Ninety of newborn male lambs of Boer×Huai goats with similar body weight were randomly divided into control group and experimental group（basal diet supplemented with 10% alfalfa） with 3 replicates in each group and 15 lambs in each replicate. The lambs were fed from 7 to 90 d, and then fed the TMR diet to 180 d.The growth and development characteristics, serological, antioxidant and slaughter indexes were measured. The results showed that at 90 d, the body weight, body height and body length of goats in the experimental group were significantly higher than those in the control group（P＜0.05）; At 180 d, the body weight, body length and chest circumference of goats in the experimental group were significantly higher than those of the control group（P＜0.05）, the total protein and insulin-like growth factor-1（IGF-1） of goats in the experimental group were significantly higher than those in the control group（P＜0.05）, and the serum superoxide dismutase in the experimental group was significantly increased（P＜0.05）.In terms of slaughter performance, live weight of lambs in experimental group was significantly higher than that in control group（P＜0.05）, but no significant differences were found among other indexes（P＞0.05）.The results indicated that feeding roughage could promote the growth and development of newborn male lambs of Boer×Huai goats, increase the contents of total protein, IGF-1 and superoxide dismutase in serum, however, had no significant effect on slaughter performance.