Abstract: With the development of straw utilization technology，corn straw as a kind of natural biomass energy，which has attracted people′s attention increasingly.Utilization mode of corn straw as fertilizer，feed，energy and industry paper making，and straw treatment method were analyzed.Mechanization harvesting methods of corn straw silage and reaping both stalk and spike were discussed emphatically.Mechanized harvesting was the premise of effective use of corn straw.It had important significance to solve waste of corn straw and improve its utilization rate.