The present invention relates to an asphalt product which uses powdery styrene-butadiene rubber macromolecular polymer as modifier to modify base asphalt and a preparation method thereof. According to the weight percentage, the asphalt product consists of 3 percent to 15 percent of aryl rubber filling oil, 2 percent to 10 percent of powdery styrene-butadiene rubber modifier and the road asphalt with the rest quantity. The aryl rubber filling oil is the furfural extracted oil with 60 percent to 95 percent of the content of aromatic hydrocarbon and heavy rubber filling oil. The road asphalt is the naphthenic base heavy oil asphalt with the content of asphalt and sulfur less than 0.5 percent and the content of colloid more than 45 percent. The modifier is the styrene-butadiene rubber with the molecular weight of 200 thousand to 300 thousand and is combined with 21.5 percent to 35.0 percent of styrene. The present invention has simple technology, convenient operation, little investment and low energy consumption. At the same time, during the process of the preparation, materials do not erode a device; a preparation technology does not produce three-waste and causes no pollution to theenvironment; the solubility among each raw material is good; the prepared product has stable performance and can not produce segregation phenomenon.