Abstract: The experiment was carried out to measure weekly the body fat and serum lipids content of Hetian chickens (female from 1w to 16 w and male from 1 w to 14 w). The serum lipids indices,including triglyceride (TG),total cholesterol (TC),high density lipoprotein-cholesterol (HDL-C) and low density lipoprotein-cholesterol (LDL-C),as well as the body fat indices,including abdominal fat percentage (PAF),subcutaneous fat ply (SFP) and intermuscular fat (IeMF),were measured. The results showed that:(1) PAF fluctuated during the testing period, except an increase in the female chickens observed after 10 week (P > 0.05);(2) SFP was significantly low-er in the 1-week-old than older chickens (P P > 0.05), except a significant increase found among the females after 10w and the males after 9w (P P P > 0.05) but a significant increase after that (P P P P P > 0.05) but a high correlation existed among the indices (P P > 0.05);and (6) the body fat content correlated with age or chickens body weight (P < 0.05), which provided a mean of body fat content estimation by using the reg ression equation.