The invention discloses a method for extracting lignite wax from lignite and belongs to the technical field of lignite utilization. The method comprises the following steps: screening lignite, crushing, putting into a fermentation device, putting residual sludge and a sugar solution into the fermentation device, uniformly stirring, adjusting the pH value, performing sealed fermentation, after fermentation is completed, taking out the lignite, drying, crushing, extracting in a mixed solution of an alcohol solution and benzene, centrifuging the obtained extract, evaluating the centrifuged extract so as to obtain a residue, and drying the residue, so as to obtain the lignite wax. By adopting the method, the lignite wax is extracted by using a two-step reaction method of microorganism extraction and chemical extraction, the yield of the lignite wax can be greatly increased, the quality of the lignite wax can be greatly improved, the environment pollution caused by a mere chemical method that extraction is carried out with an organic solvent is reduced, a novel way for preparing the lignite wax from lignite which is rich in reserve volume is developed, and the method has great significances on high-value utilization of lignite resources.