Treatment process of aluminum alloy shell with three-dimensional changing patterns

The invention relates to the field of aluminum alloy surface processing, and discloses a treatment process of an aluminum alloy shell with a three-dimensional changing pattern, and the treatment process comprises the following steps: S1, cleaning; s2, sand blasting; s3, the surface of the aluminum alloy shell is subjected to laser etching, so that the aluminum alloy shell is convexly arranged to form a three-dimensional texture composed of a plurality of convex units arranged in an array mode, and each convex unit is composed of at least three inclined reflection faces with different reflection directions; s4, laser etching is conducted on the inclined reflecting surfaces, corresponding to the same direction, of part of the protruding units, concave-arc-shaped reflecting textures are formed on the inclined reflecting surfaces, and the multiple reflecting textures in the same direction form a three-dimensional changing pattern; s5, anodic oxidation; s6, dyeing, wherein dyeing liquid is used for dyeing the alum