With the CFB as main reactor, an integrated facility was developed for the fast pyrolysis of biomass. To model the main chemical processes, the bed is divided into two zones according to the pyrolysis and secondary reaction. The pyrolysis of pine wood powder was processed by varying the bed temperature, particle size of wood powder and the feeder position. Based on the variation of the pyrolysis gas composition and the bio-oil ingredients, analysis of the experimental data highlights the important effects of temperature, heating rates and secondary reaction. The main technical problems during the experiment and the solution are also discussed.