The invention discloses preparation and an application of novel charcoal for removing hexavalent chromium in a water body. The preparation specifically comprises the following steps: crushing a brewing waste residue-of-soya raw material which is dried to constant weight at 50-80 DEG C; performing high-temperature pyrolyzation and carbonization in an oxygen-free environment; and after cooling the same to room temperature, grinding and sieving the same to obtain the efficient, stable and environment-friendly novel residue-of-soya charcoal. The application comprises the following steps: adjustingthe initial pH value of chromium-containing wastewater; and adding the residue-of-soya charcoal into the hexavalent chromium wastewater, the concentration of which is 50-150mg/L. The preparation hasthe advantages of being low in cost, simple in process, quick and efficient to adsorb and the like, and recycles the brewing waste residue-of-soya raw material effectively.