Cold region anti-aging asphalt and preparation method thereof

The invention discloses cold region anti-aging asphalt and a preparation method thereof. The cold region anti-aging asphalt comprises matrix asphalt, a 1# additive and a 2# additive; the matrix asphalt is domestic 70# matrix asphalt; the 1# additive is an organic acid with amino groups, and is a green powdery solid at normal temperature; and the 2# additive is an aniline anti-cracking agent and is a white powdery solid at normal temperature. The required raw materials have the characteristics of low price, easiness in obtaining and the like, the two additives have good compatibility with the asphalt, the preparation process is simple, even a high-speed emulsification shearing machine is not needed, and the preparation can be realized only by mechanical stirring. The preparation method of the anti-aging asphalt is simple, the requirements on preparation conditions are low, and industrialization is easy to realize. Besides, a large number of existing tests prove that the anti-aging asphalt has good low-temperat