Aiming　at　low　output　voltage　and　poor　power　supply　stability　in　the　distributed　photovoltaic　power　generation　system,　a　novel　non-isolated　dual　input　high　step-up　DC/DC　boost　converter　was　proposed.　A　switched-capacitor　circuit　was　introduced　on　the　basis　of　two　Boost　converters　to　achieve　high　voltage　gain　in　the　topology,　and　two　input　sources　can　supply　power　to　the　load　independently　or　simultaneously.　The　circuit　structure　and　working　principle　of　the　converter　were　analyzed.　The　voltage　gain　expression　of　the　converter　and　the　voltage　stress　of　the　main　switching　devices　were　derived,　and　the　relationship　between　two　input　currents　was　also　introduced.　Finally,　a　100　W　experimental　prototype　was　built.　The　experiment　results　verify　that　the　proposed　converter　has　the　advantages　of　high　voltage　gain,low　voltage　stress　of　the　switches,simple　control　and　flexible　power　supply　modes　etc.　©　2021,　Harbin　University　of　Science　and　Technology　Publication.　All　right　reserved.