With the depletion of fossil fuel reserves and the environmental problems, people pay more attention to look for a new alternative energy source. Biomass is abundant in the world and is a renewable source of energy. In conventional liquefaction process, liquid acid, such as sulfuric acid, was used as the catalyst for the conversion of biomass to liquid fuels. This liquid acid could cause serious environmental and postprocessing problems, in addition the corrosion of metallic equipments. In this work, a kind of noval catalyst was chosen for the conversion of biomass. The liquefaction of biomass was carried out in a stainless autoclave with rice husk as raw material, ethylene glycol as liquefaction solvent, Cl-/ZrO2 as catalyst (solid super acid). The morphology of catalyst was also investigated by transmission electron microscopy (TEM). The TEM observation revealed that the particles of Cl-/ZrO2 are nearly spherical in shape. The diameter of particles is less than 30 nm. The results of liquefaction showed that the catalyst has high activity. Rice husk was completely liquefied at 573K, 3h, and 8% (wt% of the reactant) Cl-/ZrO2. The advantage using solid super acid is that this catalyst was easily separated and can be recycle. After being used ten times of Cl-/ZrO2, the resident of rice husk in our novel liquefaction process is under 13%.