With growth of energy consumption and people focus on development and utilization of renewable clean energy, development and utilization of biomass technology is attracting more and more attention. But, biomass thermal liquefaction process technology, which is the most effective biomass utilization technologies, has started late, not mature yet. In recent years, national research institutions are increasing their research and technological development of the technology. Difficulty of pyrolysis technology, pyrolysis process, pyrolysis installations, and research progress were focused, and then future prospects of technology were forecasted.