To explore the effects of dietary conjugated linoleic acid (CLA) supplementing levels on meat performance and fatty acid composition in muscle and fat tissues in male kids of Guanzhong dairy goats. Twenty eight healthy male kids of Guanzhong dairy goats with the similar body weight of (25.46±4.37) kg were divided into 4 groups according to a randomized block design, and each group contained 7 replicates with 1 kid. The control group (group C) was fed basal diet, and the experimental groups were fed diets supplemented with 1% (group CLA1), 2% (group CLA2) and 3% (group CLA3) CLA, respectively. The trial lasted for 12 weeks. The results showed as follows: dietary CLA supplementation levels had no significant effects on growth performance (P>0.05); except that, the carcass chest depth and chest muscle thickness in group CLA1 were greater than those in group CLA2 and groups C and CLA3 (P<0.05), respectively, other meat performance indices had no significant difference among 4 groups (P>0.05); the contents of cis-9, trans-11-CLA, trans-10, cis-12-CLA and total CLA in muscle and fat increased significantly with the increase of CLA levels in diet (P<0.05 or P<0.01). In conclusion, the supplementation of CLA in the diet could increase the content of CLA in muscle and fat and improve the quality of mutton.［Chinese Journal of Animal Nutrition, 2010，22（3）:709-716］