Simultaneously　achieving　high　strength　and　ductility　is　a　critical　issue　for　graphene　reinforced　aluminum　matrix　composites,　which　couldn＇t　be　resolved　by　the　conventional　mechanical　milling-powder　metallurgy　technology　due　to　the　following　reasons.　On　one　hand,　the　low　addition　of　graphene　in　the　matrix　traceable　to　its　poor　dispersibility　limits　the　further　strength　improvement.　On　the　other　hand,　the　introduced　graphene　tends　to　distribute　into　grain　boundaries　rather　than　inside　grains,　which　would　result　in　stress　concentrations　at　grain　boundaries　and　localized　strains,　leading　to　the　poor　ductility　of　graphene/Al　composites.　In　this　work,　intragranular　nano-sized　graphene　nanoplates　with　high-content　were　dispersed　in　the　matrix　uniformly　by　a　modified　ball　milling　strategy,　which　induces　that　the　strength　and　uniform　elongation　of　the　composites　were　simultaneously　enhanced　due　to　the　improved　work　hardenability.　Furthermore,　the　strengthening　and　toughening　mechanisms　were　also　discussed.　This　work　offers　a　new　insight　into　the　fabrication　and　design　of　graphene/Al　composites　with　both　high　strength　and　ductility.