This experiment aimed to study the effects of anthocyanins from red elephant grass （Pennisetum purpureum Schumab cv. Red） on the growth performance， antioxidant capacity， and cecal microbial microbial structure of white-feathered broilers. A total of 210 healthy and similar-sized Shengze “901” 1-day-old male chicks were randomly divided into 5 groups， with 6 replicates in each group and 7 chicks in each replicate. Each group was fed the same basal diet， and the control group had no anthocyanin added to the drinking water. The drinking water of the treatment groups 1， 2， and 3 contained 50， 100， and 200 mg·kg^-1 of anthocyanin extracted from red elephant grass， respectively， while the drinking water of the treatment group 4 contained 100 mg·kg^-1 of anthocyanin from purple sweet potato （Ipomoea batatas L.）. The treatment period was 42 days. The results showed that： 1） The addition of red elephant grass anthocyanin to the drinking water had no significant effect on the growth performance of white-feathered broilers （P>0.05）. 2） At 21 days of age， the serum and liver malondialdehyde （MDA） content of the treatment group 2 was significantly lower than those of the control group （P<0.05）， and the serum glutathione peroxidase （GSH-Px） content and liver catalase （CAT）， glutathione （GSH）， and superoxide dismutase （SOD） contents were significantly higher than those of the control group （P<0.05）； at 42 days of age， the serum SOD content and liver GSH， GSH-Px content of the treatment group 2 were significantly higher than those of the control group （P<0.05）. 3） Compared with the control group， the relative expressions of SOD1， SOD2， GPX1， and HO-1 mRNA in the treatment groups at 21 days of age and the relative expressions of NQO1， GPX1， SOD1， and HO-1 mRNA in the treatment groups at 42 days of age were significantly increased （P<0.05）. 4） Compared with the control group， the Firmicutes in the treatment group 3 at 21 days of age were significantly reduced （P<0.05）， while the Bacteroidetes and Bacteroidetes were significantly increased （P<0.05）. At 42 days of age， Colidextribacter and Lactobacillus in treatment group 1， as well as Colidextribacter in treatment group 3， were significantly increased （P<0.05）. Conversely， Eisenbergiella in treatment groups 1， 2， and 4 were significantly decreased （P<0.05）. In conclusion， under the condition of the current study， supplementation of red elephant grass anthocyanins can enhance the antioxidant capacity in the serum and liver of white-feathered broilers， modulate the intestinal microbial community structure， and improve their resistance to oxidative stress.