In order to study the proper level of metabolizable glucose of fed to weaned piglets, 30 weaned piglets(21-dayold and average body weight of 5.5 kg) were divided into 5 treatment groups, with 6 replicates per treatment and 1 pig per replicate. This trial was divided into two phase including pre-weaning(Day 1-14) and post-weaning(Day 15 -42). Stage I: Ⅰ,Ⅱ,Ⅲ,Ⅳ and Ⅴsupplement levels of metabolizable glucose(g/kg) were 126.4, 202.6, 235.7, 331.6 and 371.5 g/kg; and those of stage II were 37.6, 132.5, 300, 354.3 and 412.5 g/kg. Piglet...