Grain　characteristics　of　rolled　1235　aluminum　alloy　were　studied　by　EBSD.　The　effects　of　hot　rolling,　cold　rolling　and　rolling　deformation　on　grain　boundaries　and　grain　size　of　the　metal　were　studied　as　well.　The　content　of　high-angle　boundaries　was　low　by　16.48　%　in　50　%　hot-rolled　1235　aluminum　alloy.　The　complete　dynamic　recrystallization　occurred,　and　grains　were　coarse.　During　90　%　hot　rolling,　the　low-angle　boundaries　turned　into　high-angle　boundaries　constantly.　The　content　of　high-angle　boundaries　was　higher　by　40.16　%.　Coarse　grains　broke　into　fine　grains,　and　grew　into　medium　grains.　In　the　90　%　cold-rolled　alloy,　the　trace　shape　of　high-angle　boundary　was　irregular.　The　lattice　distortion　was　large,　providing　the　energy　needed　in　recrystallization　during　recrystallization　annealing.　©　2020　Trans　Tech　Publications　Ltd,　Switzerland.