A composition for coloring the surface of concrete, according to the present invention, comprises: 8 wt% of a coloring dye having a size of 0.01-1 nm; 45 wt% of a diluent formed by mixing ion exchange water and ethylene glycol in a ratio of 7:3 by weight; 7 wt% of methyl methacrylate; 0.06 wt% of polydimethylsiloxane; 0.5 wt% of a fluoropolymer; 6 wt% of colloidal silica; and 25 wt% a modified silicate. According to the present invention, the pH of a surface-colored part is 11-13, which is as alkaline as the concrete of an alkaline component having a hydroxyl group of Ca(OH)3, and a firm and beautiful concrete surface is completed since the coloring thereof is carried out by penetrating 2-3 mm. In addition, semi-permanent durability is provided to the surface of concrete while simultaneously enabling stable color expression, and there are no agglomeration of a preparation or no two colors, and no spots or development phenomena during coloring.
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