In　order　to　join　wrought　magnesium　alloy　AZ31B　plates,　an　Al　matrix　filler　metal　was　developed　to　join　them　by　means　of　high-frequency　induction　brazing.　The　microstructure　and　phase　constitution　of　the　brazed　joint　were　investigated　by　scanning　electron　microscopy,　X-ray　diffraction　and　X-ray　energy　dispersive　spectroscopy.　The　mechanical　properties　and　microhardness　of　the　brazed　joint　were　also　tested.　The　results　show　that　the　single　Mg(32)(Al,Zn)(49)　phase　in　the　original　filler　metal　is　consumed　after　the　soldering　process;　moreover,　alpha-Mg　solid　solution　and　beta-Mg(17)(Al,Zn)(12)　phase　are　formed　in　brazing　region　due　to　the　intensive　alloying　between　the　molten　filler　metal　and　the　base　metal　in　the　process　of　brazing.　The　average　tensile　strength　of　the　butted　joint　is　71　MPa　and　the　average　shearing　strength　of　the　overlapped　joint　is　44　MPa.　The　fracture　surface　of　the　brazed　joint　exhibits　an　intergranular　fracture　feature　and　the　crack　originates　from　the　hard　beta-Mg(17)(Al,Zn)(12)　phase.