The invention relates to an illite loaded nanocarbon compound adsorbing material and a preparation method thereof and belongs to the field of non-metallic mineral material and environmental engineering. According to the invention, illite is taken as a carrier, soluble saccharide is taken as a carbon source and nanocarbon grains are uniformly loaded on the surface of an illite layer, so that the nanocarbon compound adsorbing material taking illite as the carrier is obtained. In the prepared illite loaded nanocarbon compound adsorbing material, the average grain diameter of the nanocarbon grains is 30-50nm, the nanocarbon grains are uniformly and compactly distributed on the surface of the illite layer and the load volume is 30%-70% of the mass of the compound material. According to the material, the illite carrier effect is utilized to increase the adsorbing capturing performance of the compound material to the pollutant and the dispersity of the adsorbent; the obtained raw materials are easily acquired and are low in cost; the preparation technique is simple and the reaction condition is mild; the illite loaded nanocarbon compound adsorbing material has higher application value in the field of wastewater treatment.