The invention belongs to the technical field of road engineering, in particular to a color asphalt binder capable of being directly applied and a preparation method thereof. The binder consists of 25 to 38 percent of petroleum resin, 12 to 22 percent of aromatic oil, 8 to 15 percent of styrene-butadiene triblock copolymer (SBS), 28 to 32 percent of color pigment, 5 to 10 percent of abherent, 0.05 to 1 percent of plasticizer, and 0.05 to 1 percent of antioxidant. The binder has a simple preparation method, can meet the technical index requirements of various building asphalts by adjusting the content of the petroleum resin, the content of the aromatic oil and the content of the styrene-butadiene triblock copolymer. Color asphalt binders in red, yellow, blue and other colors can be produced by regulating the color pigment. Furthermore, in the process of transporting the color asphalt binder, heating transportation is not required, and a special tanker for transportation is not required, so that the problems of low transportation efficiency and difficult operation of the color asphalt are solved. Meantime, the storage time of the solid particular color asphalt binder is greatly prolonged, and the color asphalt binder is convenient to apply, and has positive effect on popularization and application of color asphalt pavements.