Abstract: Introduction of corn straw into papermaking industry can alleviate shortage of papermaking resources and solve problem that straw resources can not be recycled.It was different from previous studies on development of corn straw as a whole and optimization of traditional pulping methods，the most suitable pulping material of corn straw was explored in the upper and lower parts.Through optimization of anaerobic pulping method，time and pulping conditions，key technical points and key operations were determined.