Induction　brazing　of　LY12　under　the　protection　of　Ar　gas　was　carried　out　with　low　melting　point　Al-Si-Cu-Ge　filler　metal.　The　microstructure　and　formation　phases　of　brazed　joints　were　investigated　by　means　of　scanning　electron　microscopy　(SEM),　EDS.　The　results　indicate　that　the　microstructures　of　the　brazed　joint　include　Al-Si-Cu-Ge,　Al-Si-Ge　and　Al-Cu　eutectic　phases,　Si-Ge　precipitated　phase　and　θ(Al2Cu)　phase.　The　liquids　temperatures　of　the　new-type　filler　metals　reduce　to　503°C.　A　lap　joint　of　aluminum　alloy　LY12　was　obtained　successfully　in　induction　brazing.　The　shear　strength　can　be　reached　78~98　MPa.