A　high　gain　DC　converter　with　zero　input　current　ripple　based　on　magnetic　integration　is　proposed　in　order　to　solve　the　problems　of　low　output　power　of　PV　power　module　and　large　input　current　ripple　of　DC/DC　converter.　Based　on　the　improved　Sepic　circuit　structure,　the　input　inductor　and　transformer　are　magnetically　integrated　so　that　the　converter　can　actualize　high　gain　and　zero　input　current　ripple　with　only　one　magnetic　element.　This　paper　describes　the　working　principle　of　the　proposed　converter,　the　zero　ripple　property　of　the　input　current,　the　voltage　gain,　and　the　stress　property　of　the　switching　device.　the　key　parameters　are　designed,　and　the　magnetic　integration　design　scheme　is　elaborated　in　detail.　In　order　to　prove　the　correctness　of　the　theoretical　analysis,　a　143　W,　56　V/380　V　prototype　is　established.　©　2024　Chinese　Society　for　Electrical　Engineering.　All　rights　reserved.