The invention relates to a ferric iron modified meso-porous carbon, and a preparation method and an application thereof. The ferric iron modified meso-porous carbon is obtained through loading ferric iron in the surface and the pore channels of ordered meso-porous carbon used as a carrier. The preparation method has the advantages of simplicity, simplicity in operation, and low cost; and the ferric iron modified meso-porous carbon has the advantages of good hydrophilic property, large specific surface area, large pore volume, good dispersibility, difficulty in agglomeration, difficulty in pore channel obstruction, and high skeleton structure stability, and the ferric iron modified meso-porous carbon used in adsorption removal treatment of sulfides in water has the advantages of high removal rate, high adsorption rate, simplicity in operation and short treatment period.