Biomass liquefaction technology can be applied to produce bio-based diesel, special chemicals, and liquid and gaseous fuels. Because the energy and petroleum is short of nowadays, the substitute energy technologies are researched actively in the world. This paper is intended as an investigation of the worldwide patent deployment of biomass liquefaction by using Patent Pilot analysis software. The content includes: the amount of patents、life cycle curves、competing countries、competing companies、International Patent Class analysis and patent technical efficacy matrix. Thus we can perceive the world trend today and what the patent category we can deploy in the future.