Al-Cu-Mg-Mn-Si aluminum alloy, preparation method thereof and aluminum alloy structural part

The invention relates to the field of aluminum alloy processing, in particular to an Al-Cu-Mg-Mn-Si aluminum alloy, a preparation method thereof and an aluminum alloy structural part. According to the aluminum alloy provided by the invention, by reasonably controlling the element contents of Fe, Zr and Zn and reasonably matching the element contents of Si, Mg, Mn and Cu, the high mechanical property of the aluminum alloy is realized, and the requirements of high-performance bar or profile products can be met. The preparation method of the aluminum alloy is easy and clear to operate and high in field performability, ingot casting forming and product comprehensive performance can be stably controlled, the product yield is improved, the production cost is reduced, an ingot casting produced according to the technological parameters is good in forming effect and high in structure uniformity and stability, and the aluminum alloy can be widely applied to the field of aluminum alloy production. The product quality re