Biomass energy instead of traditional energy has become a hot topic of human research.The process of biomass energy was summarized in this paper,and the certain application status home and abroad were introduced,such as producing ethanol,diesel,oil and other fuel production with biomass energy,and generating the power by biomass gasification,medium circulation,crops straw burning.The applying prospect would focus on how to use the native geographical advantage and abundant resources as biomass energy reasonably in China.The development direction of biomass energy should be the trinity with agriculture,forestry and grass,and the combination of grass subject,biological technology and other subjects,so as to create the biomass energy with low cost,environmental protection and saving resources,and it would bring huge economic benefits for society.