The microstructure and impact properties of 6082 aluminum alloy by homogenization treated were studied by optical microscope, SEM and impact testing machine. The results show that the grain structure of 6082 aluminum alloy ingots is relatively small, and there are a lot of non-equilibrium precipitates in grain boundary. After homogenization process, the number of precipitated phases is greatly reduced, the grain size increase, segregation is eliminated, non-equilibrium phase dissolve, and the reticular compound on the grain boundary is partially dissolved. The precipitated Al(MnFe)Si phase in the as-cast structure has good thermal stability. The precipitated phase gradually spheroidized with the homogenization process, and the dissolution of the cast mesh precipitated phase improved the impact resistance of the sample. After homogenized heat treatment, the comprehensive properties of the alloy have been improved, which is beneficial to use in harsh service environment.