Refining　grain　plays　an　important　role　in　improving　the　mechanical　properties　of　aluminum　alloys.　However,　the　conventional　casting　method　with　a　slow　cooling　rate　can　be　easy　to　cause　coarseness　of　the　microstructure　and　serious　segregation.　In　this　paper,　the　rapid　solidification　of　Al-Zn-Mg-Cu　alloy　was　prepared　by　the　single-roller　belt　method.　The　alloy　strip　was　studied　by　X-ray　diffraction　(XRD),　scanning　electron　microscopy　(SEM)　and　hardness　test　to　study　the　microstructure　and　properties　of　the　rapidly　solidified　aluminum　alloy.　The　results　show　that　the　roller　speed　was　an　important　parameters　affecting　the　formability　of　the　alloy.　When　the　roller　speed　was　15　m/s,　the　aluminum　alloy　produced　a　thin　bandwidth　of　5　mm　and　a　thickness　of　150　um.　As　the　rotation　speed　of　the　roller　increased,　the　cooling　rate　of　the　melt　increased,　and　the　microstructure　of　the　rapidly　solidified　Al-Zn-Mg-Cu　aluminum　alloy　strip　improved　in　grains　refinement.　Compared　with　the　conventionally　cast　Al-Zn-Mg-Cu　aluminum　alloys,　the　Al-Zn-Mg-Cu　aluminum　alloys　prepared　by　rapid　solidification　showed　much　finer　crystal　grains,　and　enhanced　solid　solubility　of　alloying　elements　with　less　precipitation　of　second　phase　and　high　hardness.　©　2020　Trans　Tech　Publications　Ltd,　Switzerland.