The growth and activities of superoxide dismutase and lysozyme of soft-shelled turtle were measured and compared through feeding with 0.2%, 0.3% of betaglucan and 0.15%, 0.25% of fructooligosaccharieds in basal formulated diet on the 100th feeding day. The results showed that the weight and survival rate of 0.25% fructooligosaccharides group were significantly higher than control group's(P<0.05). The weight and survival rate of 0.3% betaglucan showed a trend of higher than that of control group, but not significant(P>0.05). The activity of superoxide dismutase of 0.25% fructooligosaccharides group was 31.3% higher than that of control group(P<(0.05)). The activity of superoxide dismutase of 0.3% betaglucan was higher than that of control group but not significantly(P>0.05). There was no significant difference on the activities of lysozyme among the groups of (0.25%) fructooligosaccharides, 0.3% betaglucan group and control group(P>0.05).