Possessing high strength and toughness

ultra high strength aluminum alloy is a kind of structural material

which has good application value and can be applied widely in the aerospace

military and rail transit fields. The research progress and development situation of strengthening-toughening of ultra high strength 7000 aluminum alloy（Al-Zn-Mg-Cu） both in domestic and foreign countries have been fully summarized. The various new technologies for improving ultra high strength aluminum alloys properties have been commented

the research progress and development of its welding technology are also summarized. For the research status and existing problems of ultra high strength aluminum alloys

the main directions of future research should include the optimization of the content of main alloying elements

the addition of new micro-alloying elements

the adoption and development of new preparation technologies

and the existing welding technologies

to promote the application of high strength aluminum alloys in different fields.