The invention relates to a preparation method of a high-dispersion carbon black oil soiled fabric and belongs to the technical field of dyeing and printing materials. The high-dispersion carbon blackoil soiled fabric is prepared by taking ultrafine carbon black as basic stain and modifying the ultrafine carbon black with hydrogen peroxide and acrylic acid, wherein carbon black particles are in amicrocrystalline structure with concentric orientation; the carbon black has the advantages of being low in cost, mature in industrial production and excellent in physical properties; after hydrophilic groups are introduced onto the surface of the carbon black and the carbon black is oxidized by the hydrogen peroxide, the content of oxygen on the surface of the carbon black is improved, and meanwhile, the oxidized carbon black in water can significantly reduce agglomeration and improve dispersibility; the acrylic acid can have grating reaction with functional groups on the surface of the carbon black to effectively increase the steric hindrance among carbon black aggregations stably, and carboxyl of the acrylic acid can form hydrogen bonds together with water to improve dispersibility of the carbon black in water and further improve the dye uptake of dispersed soiling solution, thereby effectively guaranteeing accuracy of testing results and repeatability of the high-dispersion carbonblack oil soiled fabric.