Instantaneous　inductor　current　feedback　control　and　instantaneous　capacitor　current　feedback　control　on　Buck　mode　inverter　have　material　difference.　Taking　differential　forward　chopper　mode　inverter　with　high　frequency　link　as　an　example,　the　stability,　the　output　external　characteristic,　the　ability　of　output　shorting,　the　output　power　characteristic,　the　ability　on　nonlinear　load　and　the　dynamic　characteristic　of　inverter　were　made　fully　investigated　taking　the　theoretical　derivation　method.　The　research　results　indicate　that　the　inverter　with　instantaneous　inductor　current　feedback　control　have　features　of　restrained　inductor　current　and　output　power,　stable　work　in　output　over　current　and　short　circuit,　weak　output　characteristics　and　dynamic,　whereas,　the　inverter　with　instantaneous　capacitor　current　feedback　control　have　features　of　unconstrained　inductor　current　and　output,　unreliable　work　in　output　over　current　and　short　circuit,　strong　output　characteristics　and　better　dynamic　character.　The　conclusions　provide　significant　selection　and　design　guide　to　instantaneous　current　control　of　Buck　mode　inverter.　©2011　Chinese　Society　for　Electrical　Engineering.