In　order　to　suppress　the　turn-off　voltage　spike　and　overcome　the　hard-switching　in　traditional　current-fed　bidirectional　converters,　this　paper　presents　a　novel　current-fed　bidirectional　isolated　DC-DC　converter　with　full-operating-range　zero-voltage　switching　(ZVS).　The　primary　side　of　the　proposed　converter　is　a　Boost　half　bridge,　which　can　decrease　the　voltage　stress　on　primary　side　switches.　The　secondary　side　of　the　proposed　converter　parallels　two　active　half　bridges,　and　the　reverse　current　can　be　changed　by　adjusting　the　phase-shift　angle　within　the　secondary　side.　The　converter　adopts　the　hybrid　phase　shift　plus　pulse　width　modulation　(PWM)　control　to　make　all　switches　realize　ZVS　in　full　operating　range.　Firstly,　the　corresponding　operating　principles　are　introduced.　Then　characteristics　including　the　power　transfer　and　soft-switching　are　investigated　in　detail.　Finally,　an　experimental　prototype　with　30-60V　input　and　400　V/2.5　A　output　is　built　to　verify　the　converter　and　the　control　strategy.　©　2018,　Electrical　Technology　Press　Co.　Ltd.　All　right　reserved