In　this　paper,　a　novel　Al-Mg-Zn　filler　metal　was　designed　to　join　magnesium　alloy　AZ31B　plates　by　means　of　high-frequency　induction　brazing　in　argon　gas　shield　condition.　The　microstructure　and　the　mechanical　properties　of　the　brazed　joint　were　investigated.　The　experimental　results　showed　that　the　brazed　joint　contained　large　amount　of　alpha-Mg　and　beta-Mg-17(Al,　Zn)(12)　phases.　The　homogeneous　Mg-32(Al,　Zn)(49)　phase　in　the　original　filler　metal　was　consumed　due　to　the　intensive　alloying　during　the　brazing　process.　The　results　indicate　that　the　shear　strength　of　the　brazed　joint　is　35　MPa.　The　fracture　morphology　of　the　brazed　joint　exhibits　intergranular　fracture　mode,　and　the　fracture　originates　from　the　hard　beta-Mg-17(Al,　Zn)(12)　phase.