This experiment was conducted to study the effects of dietary arginine levels on female AA broilers aged from 1 to 3 weeks and to estimate the arginine requirement using a quadratic curve  model. Five hundred and forty 1-day-old female AA broiler chicks were randomly divided into 6 groups, and each group had 5 replicates of 18 chicks each. Six groups were fed diets supplemented with arginine at the level of 1.000%, 1.125%, 1.250%, 1.375%, 1.500% and 1.625%, respectively. The results showed that the levels of dietary arginine significantly affected the body weight (P=0.000) and the average daily gain (P=0.000) of female broilers, the levels of insulin (P=0.030) and uric acid (P=0.023) in the serum, and lymphocyte proliferation and transformation rate stimulated by LPS (P=0.050) With the increasing of dietary arginine level, it tended to improve the monocyte phagocytic rate (P=0.063，PL=0.009), reduce the depth of crypt (PL=0.075), and increase the ratio of villus height to crypt depth of jejunum (PL=0.075). The breast muscle ratio showed positive quadratic responses to the increasing of dietary arginine level (P=0.026，PQ=0.005). The fat in the breast muscle showed positive linear responses to the increasing of dietary arginine level (PL=0.008；PL=0.008). Based on the average daily gain, the insulin level and the breast muscle ratio of female broiler chicks, the optimal level of arginine is 1.38%, 1.39% and 1.35% for 1 to 3 weeks chicks, respectively, when the levels of protein, lysine and AME are set at 20.50%, 1.10% and 12.34 MJ/kg in diets.［Chinese Journal of Animal Nutrition，2011，23（4）：571 -577］