Abstract: From preparation technology of biomass carbon-based precursor and magnetic Fe3O4 material, this paper reviewed the preparation method of carbon-based magnetic solid acid catalyst at home and abroad. The synthesis methods(adsorption function, load effect, embedding technology and grafting technology) and development prospect of biomass carbon-based magnetic solid acid catalyst were summarized. We focus on introduces using the co-precipitation method and the hydrothermal method to prepare magnetic Fe3O4 material synthesized into the production process of biomass carbon-based solid acid catalyst magnetic further, and described to use the high temperature decomposition method and mic-roemulsion method to prepare magnetic Fe3O4 materials synthesized into the current situation of biomass carbon-based solid acid catalyst magnetic. The progress of the application of biomass carbon-based magnetic solid acid catalyst to hydrolysis of lignocellulose was described in detail, and the application of the catalyst in esterification reaction and condensation reaction was also introduced. The problems of biomass carbon-based magnetic solid acid catalyst industry were put forward at present, and clearly pointed out the next step of the research work. The future research priorities were forecasted, which provided the basis for the future development and industrialization of biomass carbon-based magnetic solid acid catalyst industry.