Filter cloth for treating rare earth smelting oily wastewater and preparation method thereof

The invention provides filter cloth for treating rare earth smelting oily wastewater and a preparation method thereof, and belongs to the technical field of wastewater treatment. The preparation method comprises the following steps: mixing a solution of a hydrophilic substance with nano-silica sol and a cross-linking agent, and performing a cross-linking reaction to obtain super-hydrophilic emulsion, wherein the hydrophilic substance comprises polyvinyl alcohol and/or chitosan; and soaking and drying blank filter cloth in the super-hydrophilic emulsion to obtain filter cloth for treating the rare earth smelting oily wastewater. The filter cloth prepared by the method has super-hydrophilicity, when oily wastewater is in contact with the surface of the filter cloth, due to the super-hydrophilicity of the filter cloth, water is quickly adsorbed to the surface of the filter cloth to form a layer of water film to prevent oily components from passing through, but the water can permeate downwards under the action of