The invention discloses anti-
ultraviolet-aging emulsified 
asphalt and a preparation method thereof. The method comprises the following steps: S1, preparing a 
mixed solution of 
hydrochloric acid and 
sodium nitrite, adding o-nitrochloroaniline and 
uric acid, and conducting stirring to obtain diazonium salt; S2, placing the diazonium salt in an 
ethanol solution, conducting stirring and dispersing, adjusting the pH value, conducting stirring, and adding 
hydroquinone to obtain a material A; S3, adding 
thiourea dioxide into the material A, and conducting stirring to obtain a 
copolymer monomer; and S4, adding 
aniline into a 
hydrochloric acid solution, conducting stirring, sequentially adding an emulsifier, 
ammonium persulfate, a flexibilizer, a curing agent and water-borne 
epoxy resin, adding the 
copolymer monomer and matrix 
asphalt, and conducting emulsifying to obtain the emulsified 
asphalt. The prepared emulsified asphalt mixture is good in 
conductivity, high in stability, excellent in 
ultraviolet aging resistance, mild in technological process, simple in reaction principle, very suitable for industrial production and market application and popularization, capable of greatly prolonging the service life of an asphalt material and extremely high in economic value and practicability.