To　investigate　the　effect　of　cold-rolling　and　aging　on　precipitation　and　recrystallization　behavior　of　Al-0.04Er-0.08Zr　(at.　%)　alloy,　two　thermo-mechanical　processes　containing　peak　aging　+　cold-rolling　(A　+　CR)　and　cold-rolling　+　isochronal　aging　(CR　+　A)　were　studied.　In　A　+　CR　process,　the　hardness　of　alloy　under　cold-rolled　state　was　much　higher　than　the　maximum　obtained　during　isochronal　aging,　due　to　the　strong　interaction　between　precipitates　and　dislocations　or　sub-grain　boundaries.　Furthermore,　the　recrystallization　temperature　was　475　°C　as　indicated　by　the　hardness　curve.　The　microstructure　analysis　revealed　that　the　sample　annealed　at　525　°C　for　1　h　still　don’t　recrystallize　fully.　For　CR　+　A,　it　turned　out　that　the　deformation　play　a　small　role　in　improving　the　maximum　of　hardness.　But　comparing　with　those　without　deformation,　the　existence　of　deformation　accelerated　the　rate　of　precipitation　process　and　obtained　higher　electrical　conductivity.　©　2017　Trans　Tech　Publications,　Switzerland.