A　circuit　topology　of　the　full-bridge　boost　mode　AC/AC　converter　with　high　frequency　link　is　first　proposed.　This　kind　of　circuit　topology　is　constituted　of　storage　inductor,　input　cycloconverter,　high　frequency　transformer,　output　cycloconverter,　as　well　as　input　and　output　filter.　The　steady　principles　and　phase-shifting　control　strategy　are　deeply　investigated　and　a　design　of　key　circuit　parameters　such　as　output　voltage,　storage　inductance　current,　turns　ratio　of　the　high　frequency　transformer,　storage　inductance　and　output　filtering　capacitance　are　given.　Theoretical　analysis　results　have　demonstrated　that　this　converter　has　the　advantages　such　as　high　frequency　electrical　isolation,　simple　topology,　two-stage　power　conversions(LFAC-HFAC-LFAC),　bi-directional　power　flow,　high　conversion　efficiency,　high　line　power　factor,　strong　load　adapting　ability　and　high　reliability　during　load　shortcircuit.　This　converter　lay　the　key　technical　foundation　on　new　type　excellent　performance　regulated　sinusoidal　ac　power　supply,　ac　regulator,　power　electronics　transformer,　and　same　frequency　waveform＇s　converter　etc.　The　feasibility　of　this　converter　is　verified　by　the　principle　test　results.