Abstract: [Objective]To assess the effect of dietary supplementation of fumaric acid on slaughter performance of yellow-feathered broiler and to make a comparison with that of feed additive antibiotic. [Method]A total of 90 one-day-old yellow-feathered broilers were included in this study and were randomly assigned to one of three groups with 3 repeats for each group such that negative control group fed basal diet with no antibiotic, positive control group fed basal diet with antibiotic, experimental group fed basal diet containing 2 g/kg fumaric acid. The broilers were reared under the same breeding and management condition.At 79 days of age, one broiler was selected from each repeat. The chosen broilers were weighted and slaughtered, and the dressing percentage, half eviscerated rate and total eviscerated rate was determined. [Results]The experimental group had higher dressing percentage and half eviscerated rate（P〉0.05） as well as significantly higher total eviscerated rate（P〈0.05） than the two control groups. [Conclusion]Dietary supplementation of 2 g/kg fumaric acid improved the slaughter performance of yellow-feathered broiler and exhibited better performance than feed additive antibiotic.