The study focused on the effects of different doses of chlorogenic acid on the performance and antioxidant capability of Trionyx sinensis. One hundred and sixty healthy Trionyx sinensis with an average weight of （140.78±24.18） g were selected, and randomly divided into 5 groups with 4 replicates in each group and 8 turtles in each replicate. Groups A~E were added 0, 100, 200, 400 and 800 mg/kg of chlorogenic acid, respectively. The trial lasted for 60 days. Weight gain rate, calipash ratio and body fat ratio, the collagen contents of calipash and muscle, the moisture, crude protein, crude fat and cholesterol contents of muscle, the GSH-Px, SOD and CAT in blood of Trionyx sinensis were measured. The results showed as follows: 1) weight gain rate in group C was significantly higher than that in the control group (P<0.05); 2） there were no significant differences in calipash ratio, body fat ratio, and moisture, and crude lipid in muscle among five groups （P>0.05）; 3） collagen content in calipash of the experimental groups was significantly higher than that in the control group （PB＜0.05, PC＜0.01, PD＜0.01, PE＜0.01）, and muscle collagen content in groups C and D was significantly higher than that in the control group （P＜0.05）; 4） muscle crude protein content in group D was significantly higher than that in the control group （P＜0.05）; 5） muscle cholesterol content in groups C and D were significantly lower than that in the control group （P＜0.05）; 6） the activity of GSH-Px in groups C and D was significantly higher than that in the control group （PC＜0.05, PD＜0.01）, the activity of SOD in groups B, C and D were significantly higher than that in the control group （PB＜0.01, PC＜0.01, PD＜0.05）, and the activity of CAT in group C was significantly higher than that in the control group (P<0.01). In conclusion, adding 200～400 mg/kg chlorogenic acid in the diet could not only increase antioxidant capability of Trionyx sinensis, but also improve their performance. ［Chinese Journal of Animal Nutrition, 2010，22（3）:729-733］