NOVELTY - Biomass processing comprises putting the biomass into a cracking reactor after drying and crushing, carbonizing the biomass into charcoal and oil gas products; reacting a part of the charcoal with air to generate carbon monoxide; entering the rest of the charcoal into a charcoal tank for secondary process; fractionating oil gas to obtain medium thermal-value gas, pyroligneous liquid and wood tar, and hydrogenerating the wood tar with hydrogen catalyst.    USE - Process for processing biomass (claimed).    ADVANTAGE - The process effectively solves the problem about source of heat for cracking of biomass and separation of products and secondary process and cracking of wood tar. It has simple technique, protects environment, and saves energy.    DETAILED DESCRIPTION - Biomass processing involves putting biomass into a cracking reactor after drying and crushing, and carbonizing the biomass into charcoal and oil gas products at 500-800 degrees C. The products contain (wt.%) oil gas (30-70), carbon-containing dust (5), and charcoal (30-70). A part of the charcoal enters a gasifier from lower gas outlet and reacts with air at 700-1200 degrees C to generate carbon monoxide. The rest of the charcoal enters a charcoal tank for secondary process. The oil gas takes the dust to pass through deposition chamber, cyclone separator, and net filter at greater than 250 degrees C to remove the dust. It enters a fractionating tower having top at less than 40 degrees C, bottom at greater than 200 degrees C, and pyroligneous liquid outlet at 85-95 degrees C to fractionate to obtain 1/3 of medium thermal-value gas, 2/3 of pyroligneous liquid and wood tar by weight. The medium thermal-value gas returns to the cracking reactor after mixing with the carbon monoxide in the gasifier for the cracking reactor as fuel. The pyroligneous liquid is sent to the pyroligneous liquid tank for secondary process. The wood tar enters a hydrogenation reactor to have hydrogenation by hydrogen catalyst at 300-500 degrees C under 0.1-20 MPa. The volume ratio of hydrogen and wood tar is 1000-10000:1. Hydrogenation product is generated by the hydrogenation, and fractionated to obtain mixture of liquid gas, gasoline, and diesel fuel.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view of the reactor.    Deposition chamber (2)    Cyclone separator (3)    Net filter (4)    Fractionating tower (5)    Hydrogenation reactor (6)    Gasifier (7)