Abstract: With the limitation in conventional energy and the increasingly serious environmental pollution,it necessary to find some more clean regeneration energy.Because of the large quantity,low effect to environment and the reproducible ability,plant biomass chemical technology became one of the main selected energy,therefore it can be paid attention for its high valued liquid and gas products that can be used for effective clean energy.In the article,the chemical technology progress of plant biomass energy combustion and four ways of these technologies are introduce,including combustion,pyrolysis,liquefaction and gasification.