The present study aimed to investigate the effects of different proportions of fermented straw replacing corn in the diet on growth performance and intestinal health in finishing pigs. 275 commercial healthy finishing pigs aged 126 days. The average body weight was 82.96 kg. The pigs were randomly allocated into three groups: Control group (A, basal diet), 5% fermented straw group (B, replacing 5% of corn), and 10% fermented straw group (C, replacing 10% of corn). 6 replicates in each group and 14-16 pigs per replicate. On day 39 of the experiment, one animal from each replicate was slaughtered for sampling and further analysis.