The present disclosure provides a preparation method of carbon black synthetic filter materials and an application thereof, which are prepared by impregnating nonwoven fabric filter fibers in a mixed solution consisting of carbon black, animal glue, glycerin, urea, cupric complex of amino acid, Turkey red oil, methylsilicone oil and deionized water, the nonwoven fabric filter fibers are coated with carbon black; wherein, the mixed solution is composed of the following weight parts of raw materials: 2˜4 parts of carbon black, 1˜3 parts of animal glue, 1˜3 parts of glycerin, 0.2˜0.4 parts of urea, 0.03˜0.06 parts of cupric complex of amino acid, 0.05˜0.15 parts of Turkey red oil, 0.05˜0.15 parts of methylsilicone oil, and 45˜55 parts of water. The present disclosure can improve the elimination of contaminants effectively and utilizing the installation space for the current filters efficiently, with strong practical significance and promotion value.