The　circuit　topology,　control　strategy,　characteristic　of　steady　principle,　derived　method　of　voltage　transmission　ratio,　and　design　criteria　of　key　circuit　parameters　of　the　bi-directional　Boost　DC/DC　converter　mode　inverter　with　high　voltage　transmission　ratio　are　proposed　and　deeply　investigated　in　the　paper.　The　simulation　analysis　and　the　principle　test　results　are　given.　This　kind　of　inverter　is　differentially　constituted　of　two　same　bi-directional　Boost　DC/DC　converters　with　high　voltage　transmission　ratio　which　produce　out　of　phase　low-frequency　sinusoidal　pulsate　DC　output　voltage.　The　theoretical　analysis,　the　simulation　and　the　principle　test　results　demonstrate　that　this　kind　of　inverter　which　have　the　advantages　of　simple　topologies,　bi-directional　power　transmission,　high　voltage　transmission　ratio,　high　power　density,　small　input　current　ripple,　simple　control,　high　reliability　under　short-circuit,　wide　application　prospect　and　so　on,　and　provide　key　technical　fundamental　for　large　capacity　inverter　with　high　voltage　transmission　ratio.