For　the　different　circuit　topologies　of　combined　bi-directional　forward　converter　mode　and　forward　chopper　mode　inverters　with　high　frequency　(HF)　link,　control　strategies,　theory　characteristics　and　design　criteria　for　those　key　circuit　parameters　of　these　two　inverters　were　compared　and　researched　in　this　paper.　Taking　the　theoretical　derivation　method,　a　series　of　important　relativities　of　the　quality　of　output　voltage　waveform,　turn　ratio　and　power　losses　of　HF　transformer,　input　filter,　voltage　and　current　stresses　of　power　switches　between　these　two　inverters　were　obtained.　Those　analysis　and　experiment　results　indicate　that　the　combined　bi-directional　forward　chopper　mode　inverter　has　better　performance　due　to　its　single　power　stage　and　none　current　circulation.　What＇s　more,　its　turn　ratio　N2/N1　is　reduced　from　42/3　to　39/3　and　output　voltage　variation　is　improved　from　inner　±2　V　to　inner　±1　V.　These　two　combined　bi-directional　forward　mode　inverters　with　HF　link　are　featured　by　application　prospect　in　the　inverting　field　of　galvanic　occasion,　high　power　density,　and　high　power　efficiency.