Energy is the foundation of survival and development of modern society.The supply of clean fuel is relationship with the sustainable development of national economy and one of the foundations of the national strategic security.The diminishing storage of fossil energy urges people to seek renewable energy for sustaining the development of our industrialized society.Biomass energy is an important renewable energy,which is the only one converted directly to carbon liquid fuel and has great compatibility in the use of technology with fossil fuels.The scientists at home and abroad have carried out lots of beneficial explorations and obtained some basic understandings and exciting preliminary findings in this field.However,there has a long way for realizing the real scale from the standards and measures of industrial development.Especially,the energy use of biomass resources in the process of energy conversion is weak.It needs a significant breakthrough in the basic rules of biomass conversion.The author devotes long-term to the basis and engineering amplification research in the fields of biodiesel,fuel ethanol,biological gas,water-phase catalysis and gasification synthesis of clean biofuels.This report mainly introduces the works on synthesis of alcohols,ethers and hydrocarbons based on sugar and syngas platforms.In the aspect of sugar platform we obtained more than 80 ％of the total sugar yield by acid-acid coupling technology,and converted the sugar acquired to sugar sorbitol/xylitol with high selectivity (＞90 ％) by the Raney Ni catalyst.The sugar alcohols obtained may be converted to C5 / C6 alkanes with 90 ％yield and aromatic hydrocarbons with 70 ％yield by hydrogen-oxidization reaction.Furthermore,we revealed the above structure-performance relationship between the catalyst and reaction,built hundred tons demonstration system of biomass water phase catalytic synthesis gasoline and jet fuels,and realized 8 tons of straw (or 4.5 tons of duckweed or 3.5 tons of cassava) to produced one ton of oil.In the aspect of syngas platform we obtained the rich low carbon olefins (＞30 c-mol ％) syngas by lignocellulosescatalytic cracking reaction,and produced C9-C14 hydrocarbons fuel with the yield of 480 g/kgcat.h by olefin polymerization-hydrogenationisomerization reaction.Based on morphology-controlled synthesis of catalytic materials,the Fe3O4 nano-particles with different morphologies,hierarchical structure of Fe3O4 (pore adjustable) and TiO2 nanotubes confined Fe/Co catalysts were prepared,which enhanced greatly the activity,selectivity and stability for Fischer-Tropsch synthesis.Furthermore,we developed the multi-functional CuZnAl/AlooH dimethyl ether synthesis catalystand bimodal derived Cu-Fe based higher alcohols synthesis catalyst,and established the thousand tons pilot plant of syngas synthesis biofuels.