The invention relates to a cold-patch additive material and a preparation method and application thereof. The material is prepared from 17%-20% of
trichloroethylene, 11%-16% of SBS, 9%-13% of EVA, 42%-46% of diesel and13%-21% of clean oil; during preparation, the SBS is added into the
trichloroethylene until no
solid residues exist to obtain a
prepolymer A, the EVA is added into the diesel until no
solid residues exist to prepare a
prepolymer B, the
prepolymer A and the prepolymer B are poured into the clean oil to prepare the cold-patch additive material; when a modified
asphalt mixture is prepared, the cold-patch additive material accounts for 10%-14%,
asphalt accounts for 72%-80%, and a
diluent accounts for 10%-14%. The cold-patch additive material and the preparation method and application thereof have the advantages that a
capsule technology and a
polymer thickening and reinforcing technology are introduced, the storage performance, workability,
initial strength, durability and bonding performance of the modified
asphalt mixture can be improved, and it is ensured that the modified asphalt mixture has excellent performance.