Abstract: The single factor density gradient method was used in this study to evaluate the effects of astaxanthin on the body color, growth and several index of nonspecific immune of blood parrot. Blood parrot were fed on basal diet with 0‰,1‰,2‰, 3‰,4‰ astaxanthin for 7 weeks, The body color and growth index were measured every 7 days. After 7 weeks, the activities of total antioxidant capacity （T-AOC）, catalase （CAT）, superoxide dismutase （SOD） and the activity of lysozyme （LSZ） were measured. The results showed that, the hyperchromic effect of 4 ‰astaxanthin group on the blood parrot was significantly higher than the control group, the growth rate were higher in the 2%v and 3‰ group. The activities of T-AOC and CAT in the 4 ‰astaxanthin group were significantly higher, but there were insignificant different of SOD activity in the blood and liver and LSZ in the gill among all the treatment groups. Therefore, add different level of astaxantin in a certain range had significant effect to blood parrot body graces, but had similar effects on the nonspecific immune index.