The　circuit　topology　of　the　differential　Forward　DC-DC　converter　mode　inverter　with　high　frequency　link　was　proposed.　Circuit　topology,　transient　voltage　control　strategy,　steady　principle　characteristic　and　design　criteria　for　the　key　circuit　parameters　were　deeply　investigated.　This　kind　of　inverter　was　differentially　constituted　of　two　same　Forward　DC-DC　converters　with　out　of　phase　low-frequency　sine　pulsate　DC　output　voltage.　The　analysis　and　simulation　results　shows　that　the　converter　has　the　advantages　such　as　high　frequency　electrical　isolation,　simple　topology,　bi-direction　power　flow,　small　output　ripple　voltage,　strong　adaptability　to　various　loads　etc.　The　correction　and　feasibility　of　this　inverter　are　fully　verified　by　the　principle　test.　The　inverter　lay　the　key　technical　foundation　on　new　inverting　power　supplies.　©2010　Chin.Soc.for　Elec.Eng.