The　AA3003　aluminum-alloy　melt　was　treated　with　different　types　of　melt　treatment,　and　the　effect　of　the　melt　treatment　on　the　microstructure　and　mechanical　properties　of　the　alloy　was　investigated.　The　results　show　that　the　impurity　content　of　the　untreated　(UT)　AA3003　aluminum　alloy　reached　0.6801　%.　Its　structure　contains　two　kinds　of　particles,　beta-Al　(FeMn)　and　alpha-Al　(MnFeSi),　whose　distributions　look　like　long　strips,　massive　and　skeletal　forms,　reducing　the　strength　and　plastic　toughness　of　the　material.　After　the　efficient　integrated　treatment　(EIT),　the　impurity　content　of　the　alloy　decreased　significantly,　and　the　fluidity　of　the　aluminum　melt　was　improved,　which　is　conducive　to　the　role　of　a　refiner,　refining　the　cast　grain　size.　An　addition　of　La　and　Ce　during　the　EIT　eliminates　the　presence　of　the　harmful　second-phase　Mn　(MnFe)　Si　and　Al　(FeMn)　distributed　at　the　grain　boundaries.　The　grain　boundaries　become　stable,　and　the　heat　resistance　and　high-temperature　performance　of　the　alloy　are　improved,　which　is　advantageous　for　the　hot-deformation　processing.　The　purity　of　the　AA3003　aluminum　alloy　is　significantly　improved　with　the　EIT,　which　is　conducive　to　the　subsequent　grain　refinement　and　modification　so　that　the　metallurgical　quality　of　the　alloy　is　significantly　improved.　Its　mechanical　properties　at　room　temperature　and　after　a　thermal　deformation　are　superior　to　those　of　the　AA3003　aluminum　alloy　processed　with　the　conventional　integrated　treatment　(CIT).