The effects of reducing sugar on the yield of bamboo residues powder were investigated.The experimental results showed that mesh count,temperature and the pH of the hydrolysis effectively enhanced the reducing sugar yield.The Bamboo of 80～150 mesh count were pretreated by hydrolysis with pH 4.0 and 120℃ temperature for 40 min.The cellulose,the lignin contents and the reducing sugar yields were reached at 52.24%,16.33%and 54.29mg/g,respectively.The temperature had a significant influence on the yields: under the same conditions,when the temperature raised from 120℃ to 180℃,the cellulose contents were increased about 13.63% and the reducing sugar was increased 327.33%,up to 232.00mg/g.