Magnesium　alloy　AZ31B　plates　was　soldered　by　means　of　high-frequency　induction　soldering　using　Zn　matrix　filler　metal.　The　interfacial　microstructures　and　the　mechanical　properties　of　the　soldered　joint　were　studied.　The　interfacial　microstructures　and　formation　phases　of　the　soldered　joint　were　investigated　by　scanning　electron　microscopy,　X-ray　diffraction　and　X-ray　energy　dispersive　spectroscopy.　The　strength　of　the　soldered　joint　and　the　microhardness　of　microstructure　of　the　soldering　seam　were　also　tested.　The　results　showed　that　Zn　matrix　filler　metal　reacted　with　the　base　metal　AZ31B　and　alpha-Mg　and　gamma-MgZn　phases　were　formed　in　the　soldering　seam　region.　Average　tensile　strength　of　the　butted　joint　was　77　MPa　and　average　shearing　strength　of　the　overlapped　joint　was　55　MPa.　The　fracture　analysis　results　indicated　that　fracture　surface　of　the　soldered　joint　mainly　exhibited　intergranular　fracture　mode.　The　crack　originated　from　alpha-Mg+gamma-MgZn　eutectoid　structure　and　interface　of　alpha-Mg　matrix　and　alpha-Mg+gamma-MgZn　eutectoid　structure.