This study was conducted to determine the concentration of DE and ME in high fiber diet (corn-wheat-bran meal) and low fiber diet (cornsoybean meal).In this experiment,48 barrows (24 barrows were 40 ± 3.2 kg,another 24 were 85 ± 4.1 kg) were randomly allotted to a 2 × 2 factorial design with 8 treatments and 2 diets,and each treatment had 6 barrows.