The　phase-shifted　full-bridge　DC/DC　converter　is　a　very　important　component　of　power　electronics　and　is　suitable　for　medium　and　large　power　output　applications　based　on　switching　power　supplies.　Aiming　at　the　implementation　of　soft-switching　and　the　problem　of　power　loss,　this　paper　firstly　describes　the　structure　and　working　mode　of　DC/DC　converter,　then　analyzes　the　calculation　and　selection　process　of　resonant　inductance　and　capacitance　parameters　in　the　converter,　and　finally　adopts　the　traditional　PI　control　to　achieve　stable　control　of　the　output　voltage.　The　simulation　and　experimental　results　fully　prove　the　feasibility　and　rationality　of　the　design　and　parameter　selection　of　this　scheme.