The invention discloses normal-temperature-mixed colored asphalt and a preparation method thereof. The normal-temperature-mixed colored asphalt comprises, by weight, 40-50 parts of aromatic hydrocarbon oil, 30-40 parts of petroleum resin, 5-10 parts of polyurethane, 2-8 parts of styrene butadiene rubber, 19.5-27 parts of solvent oil and an appropriate amount of color powder. The preparation method includes: weighing the raw materials according to the proportion, heating the aromatic hydrocarbon oil, adding the polyurethane, the petroleum resin and the styrene butadiene rubber, and mixing and stirring; performing heat preservation at 170-190 DEG C for 1-2 hours to obtain matrix resin; cooling to 70-90 DEG C, and adding the solvent oil and the color powder to obtain the normal-temperature-mixed colored asphalt. The colored asphalt has the advantages that the colored asphalt can be mixed with stone under normal temperature, pavement paving and rolling are then performed, the preparation process of colored asphalt mixed materials is simplified greatly, and a colored pavement can be constructed simply and conveniently.