Al-Zn-Mg　series　aluminum　alloys　have　important　applications　in　aerospace,　transportation　etc,　for　their　excellent　properties　of　low　density　and　high　strength.　Further　optimizing　the　microstructure　to　obtain　higher　mechanical　properties　and　better　corrosion　resistance　is　the　development　direction　of　Al-Zn-Mg　alloys.　Microalloying　has　become　an　important　means　of　improving　the　properties　of　aluminum　alloys,　owing　to　the　limited　space　for　alloy　composition　optimization　and　heat　treatment　processes　improvement.　The　effects　of　microalloying　elements　on　the　mechanical　properties,　hot　deformation　behavior　and　corrosion　resistance　of　Al-Zn-Mg　alloys　were　briefly　summarized,　focusing　on　the　different　effects　of　the　second　phase　particles　formed　by　microalloying　elements　in　different　process　stages,　such　as　effectively　refine　grains　and　strongly　hinder　the　movement　of　dislocations.　The　effects　of　pin　grain　boundaries,　sub-grain　boundaries　and　inhibiting　recrystallization　during　hot　deformation　were　discussed.　The　internal　mechanism　of　improving　the　corrosion　resistance　of　the　alloy　was　explained.　In　addition,　the　further　research　direction　of　microalloying　of　Al-Zn-Mg　aluminum　alloy　was　prospected,　understanding　the　interaction　mechanism　of　microalloying　elements　and　dual　alloying-microalloying　elements　to　realize　the　precise　and　accurate　addition　of　microalloying　elements　will　be　one　of　the　main　research　contents　in　the　future.　Clarifying　the　regulation　effect　of　microalloying　elements　on　deformation　structures　and　dislocation　configurations　during　hot　working　will　provide　a　reference　for　improving　the　corrosion　resistance　of　alloys.　©　2022　Beijing　Institute　of　Aeronautical　Materials　(BIAM).　All　rights　reserved.