The invention belongs to the technical field of biomass materials, and particularly relates to a method for preparing a hemicellulose film by a high-consistency disc refiner. The method for preparingthe hemicellulose film by using the high-consistency disc refiner comprises the following steps: carrying out enzymolysis, carrying out pulping, carrying out stirring and carrying out air drying. According to the method disclosed by the invention, the hemicellulose film is prepared by combining enzyme pretreatment with a mechanical grinding method, so that energy consumption can be reduced, and efficiency is improved; and no chemical reagents are added in the preparation process, so that the environmental pollution is small.