This paper mainly studies the high-temperature steamed sugarcane leaves For preparing xylan.There were four factors influenced extraction: pre-soaking methods,liquid-solid ratio,boiling time and temperature.The results show that: when the boiling temperature rose,the total sugar content increased;when boiling time extend,it increased firstly,then reduced;When the proportion of water to the sugarcane leaves increased,it increased and then decreased.This study also provided the best production technology conditions: the sugarcane leaves soaking for 12 h with water at 60 ℃,for 60 min,the proportion of the sugarcane leaves with distilled water 1∶ 10,then cooking at 126 ℃ for 60minutes.Scanning electron microscope(SEM) analysis was used to observe residue morphology before and after cooking.The results indicated that high-temperature cooking helped the dissolution of xylan.This result provided a basis to prepare xylo-oligosaccharides from xylan by enzyme in future.