Abstract: In order to explore the effects of different roughages in the diet on growth performance, blood biochemical indexes and slaughter performance of Lyuliang black goats, 24 healthy and castrated Lyuliang black goats ram aged 6 months with similar body weight were selected and randomly divided into 4 groups（groups A, B, C and D）, with 6 goats in each group. They were fed a total mixed diet with corn straw, peanut vine, alfalfa hay, and leymus chinensis as roughages with a concentrate to forage ratio of 6∶4. The pre-test period was 10 days, and the test period was 80 days. The growth performance（initial weight, final weight, average daily gain, average daily feed intake, and feed to gain ratio）, blood biochemical indicators（blood glucose concentration, serum total protein, albumin and globulin levels, serum alanine aminotransferase and aspartate aminotransferase activities, and serum triglyceride and total cholesterol concentration）, and slaughter performance（live weight before slaughter, carcass weight, slaughter percentage, and net meat percentage）. The results showed that there was no significant difference in the initial weight among all groups（P＞0.05）. The final weight in group C was the highest, which was slightly higher than that in group B and group D（P＞0.05）, and significantly higher than that in group A（P＜0.05）. The final weight in groups B and D was significantly higher than that in group A（P＜0.05）. The average daily gain in group C was the highest and extremely significantly higher than that in the other three groups（P＜0.01）. The average daily gain in group B and D was significantly lower than that in group A（P＜0.01）. The average daily feed intake in group C was the lowest, which was slightly lower than that in groups B and D（P＞0.05）, and significantly lower than that in group A（P＜0.05）. The average daily feed intake in groups B and D was significantly lower than that in group A（P＜0.05）. The ratio of feed to gain in group C was the lowest, which was extremely significantly higher than that in the other three groups（P＜0.01）, and the ratio of feed to gain in groups B and D was extremely significantly lower than that in group A（P＜0.01）. The blood glucose concentration in group C was the highest, which was slightly higher than that in group B and group D（P＞0.05）, and significantly higher than that in group A（P＜0.05）. The blood glucose concentration in groups B and D was significantly higher than that in group A（P＜0.05）. The levels of serum total protein and globulin in group C were significantly higher than those in the other three groups（P＜0.01）. The levels of serum total protein and globulin in groups B and D were significantly higher than those in group A（P＜0.01）. The serum albumin concentration in group C was the highest, which was slightly higher than that in group B（P＞0.05）, and significantly higher than that in group A and D（P＜0.01）. The serum albumin level in group B was significantly higher than that in group A and D（P＜0.01）. The serum albumin level in group D was significantly higher than that in group A（P＜0.01）. There were no significant differences in the activities of serum alanine aminotransferase and aspartate aminotransferase and the concentrations of urea nitrogen, triglyceride and cholesterol among the groups（P＞0.05）. The live weight before slaughter in group C was the highest, which was slightly higher than that in groups B and D（P＞0.05）, and significantly higher than that in group A（P＜0.05）. The live weight before slaughter in groups B and D was significantly higher than that in group A（P＜0.05）. After slaughter, the carcass weight in group C was the highest, which was slightly higher than that in groups B and D（P＞0.05）, and significantly higher than that in group A（P＜0.05）. There was no significant difference in dressing rate and net meat rate among all groups（P＞0.05）. In conclusion, the whole mixed diet with alfalfa hay as roughage had the best effects on improving performance, slaughter performance and blood biochemical indexes of Lyuliang black goats under the experimental conditions.The peanut seedling and leymus chinensis had a better effect, but the corn straw had the worst effect.