Aluminum　alloy　is　one　of　the　most　widely　used　materials　in　modern　society　because　of　its　characteristics　such　as　low　density,　high　specific　strength　and　good　corrosion　resistance.　Nano-ceramic　particles　have　the　advantages　of　high　strength,　high　modulus,　good　thermal　stability,　etc.　With　the　continuous　development　of　nano-material　technology,　the　application　of　nano-ceramic　particles　as　strengthening　materials　in　aluminum　alloy　welding　has　been　paid　more　and　more　attention.　In　the　process　of　aluminum　alloy　welding,　the　problems　such　as　weld　microstructure　roughening,　joint　softening　and　thermal　crack　are　easy　to　lead　to　the　failure　of　aluminum　alloy　joint　in　service.The　addition　of　nanoparticles　into　welding　seams　has　the　functions　of　refining　weld　grain,　modifying　secondary　phase　morphology,　reducing　welding　heat　crack,　and　strengthening　weld　performance.　It　has　been　used　in　the　welding　field　of　high　strength　aluminum　alloy　such　as　aviation,　aerospace,　automobile　and　high-speed　bullet　vehicle.　Recent　studies　have　shown　that　the　content,　composition　and　other　physical　properties　of　nanoparticles,　welding　technology　and　nanoparticle-matrix　interface　have　significant　effects　on　the　microstructure　and　mechanical　properties　of　welding　seams.　With　the　increase　of　the　content　of　nanoparticles,　the　weld　strength　was　significantly　increased,　but　the　high　content　of　nanoparticles　was　easy　to　induce　agglomeration.　Different　kinds　of　nanoparticles　can　play　a　synergistic　strengthening　role.　In　addition,　welding　current,　friction　stir　parameters,　ultrasonic,　vibration　and　other　technological　methods　in　the　welding　process　can　promote　the　flow　of　molten　pool　to　improve　the　dispersion　degree　of　nanoparticles　in　the　welding　seam　and　enhance　the　strengthening　effect　of　nanoparticles.　In　this　paper,　the　latest　research　status　of　nano-ceramic　particles　in　aluminum　alloy　welding　in　recent　years　was　reviewed,　and　the　influence　of　the　physical　properties　and　welding　technology　of　nano-ceramic　particles　on　the　strength　of　composite　weld　was　summarized.　The　influence　of　nano-ceramic　particles　on　the　microstructure　and　thermal　crack　of　welding　seam　was　analyzed,　the　interface　bonding　between　nano-particles　and　matrix　was　discussed,　and　the　future　research　direction　was　prospected.　©　2022,　Materials　Review　Magazine.　All　right　reserved.