Abstract: China is a large agricultural country with large annual output of crop straw，among which corn straw output is the largest，but resource utilization rate of corn straw is low.Research situation of biogas production from corn straw was introduced based on analysis of current situation of production and utilization of corn straw.Key technologies of biogas production from corn straw including pretreatment technology，dry fermentation technology and mixed material fermentation technology were expounded.Prospect of biogas production from corn straw was prospected which provided a reference for further promoting comprehensive utilization of corn straw.