Abstract: In order to study effects of red clover （Trifolium pratense） isoflavone on production performance and meat quality, one hundred and eighty 1dayold AA broilers were randomly assigned to three groups, which were the fed with basic diet (control), the basic diet+red clover isoflavone (10 mg/kg) and the basic diet+red clover isoflavone (20 mg/kg), respectively. The results indicated that the red clover isoflavone could increase daily gain and slaughter performance (P0.05), reduce the contents of triglyceride (TG), total cholesterol (TC) in serum and the percentage of abdominal fat of broiler (P0.05). The contents of malondialdehyde (MDA) (P0.05), drip loss and shear force of muscle were decreased after feeding red clover isoflavone(P0.05). In conclusion, the red clover isoflavone could modulate growth performance and slaughter performance; improved meat quality in broilers. The broilers were fed with the diet content of 20 mg/kg red clover isoflavone had the highest daily gain.