Today， mankind is moving from a civilization based on industry to one which recognizes the importance of the ecosystem. To realize sustainable development， it is a prerequisite to find a clean substitute for the oil resources. Biomass， the solar energy stored in chemical form in plant， has attracted both industrial and academic interest as a promising clean and renewable resource.
　　Biomass conversion technology owns significant advantages over other conversion technologies for being environment friendly， effectively， and operation condition moderately. Therefore， it attracts more attentions in comparison to the physical and chemical conversion technologies. Over the past 20 years， the author has been devoted to the study of biomass conversion and product development. And， luckily， breakthroughs were made in the setup of a steam explosion-based pretreatment platform， solid-phased-enzyme-fermentation-separation coupling platform， and large-scale-solid-phased pure cultivation platform. All those platforms have been applied in industrialization productions and have received extensive acceptance from colleagues and enterprises. In the process of research and application， we proposed the notion of biomass biochemical conversion technology platj'orm， which not only guided engineers to realize the biochemical conversion of biomass， but was also devoted to the development of related disciplines.
　　With the development of research on biomass， related works have been published continuously. However， most of them focus on specified techniques for oriented biomass conversion， but only a few have provided a systematic and comprehensive review on the techniques employed. The author has summarized the existing research routes and results for the construction of biomass conversion platforms. It is expected to promote the conversion and use of biomass resources.
　　The first two chapters review the unit operations of biomass conversion. Chapters 3-8 discuss conversion platforms： pretreatment platform， enzyme platform， cell refinery platform， sugar platform， fermentation platform， and posttreatment platform. Chapter 9 discusses polygeneration of the bioconversion products.