Abstract: Using cerium zirconium solid solution catalyst to degrade methyl orange is one of the most promising methods at present and the development of catalysts with biological structure is of great significance. In this paper, cerium zirconium solid solution with biological structure was synthesized with wood fiber as biological template. By scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS） and uv-vis spectrophotometer, the surface and composition information, crystal structure, internal binding energy standard and photocatalytic degradation rate of methyl orange of cerium zirconium solid solution samples with hierarchical biological morphology were characterized. The results show that the new catalyst has a larger specific surface area than the untemplated cerium zirconium solid solution, which can greatly enhance the degradation rate of macromolecular pollutants in water, and finally realize the photocatalytic degradation of organic pollutants such as methyl orange.