Abstract: Aming at the problem that  the lignocellulose had a  complex structure and was difficult to  degrade and utilize,  resulting in environmental pollution when it burned,  we used cellulase to  hydrolyze  cellulose from lignocellulose into glucose. Firstly, the rice straw was pretreated using sodium hydroxide solution. Secondly,  the rice straw before and after the pretreatment was analyzed by scanning electron microscopy,  Fourier transform infrared spectroscopy,  and X-ray diffraction. Finally, the cellulase produced by Aspergillus niger Q7 was used to hydrolyze and pretreat rice straw. The results show that after pretreatment, the fiber structure of rice straw is opened, the surface area increases, and the crystallinity increases.  The cellulose content in rice straw increases after pretreatment,  while the content of hemicellulose and lignin decreases.  The glucose content of pretreated rice straw is higher than that of unpretreated rice straw. 

Key words: rice straw,  , pretreatment,  , cellulose, cellulase,  , enzymolysis