As　one　of　green　renewable　energy　sources,　the　solar　energy　has　an　enormous　developing　potentiality　to　derive　many　devices.　In　order　to　meet　the　demands　of　boosting　of　solar　photovoltaic　generation,　a　novel　three-level(TL)　LCC　resonant　converter　with　voltage　multiplier　is　proposed　in　this　paper.　The　converter　is　composed　of　Neutral　Point　Clamped(NPC)　inverter,　LCC　resonant　tank　and　Cockcroft　Walton(CW)　voltage　multiplier.　Furthermore,　an　RC　equivalent　circuit　model　can　simplify　the　design　and　analysis　of　the　converter　is　proposed.　And　by　applying　a　NPC　inverter　to　the　primary　side,　the　voltage　stress　of　the　switches　are　half　of　the　input　voltage　and　TL　voltage　is　supplied　to　the　post-stage　circuit.　Besides,　Zero　Voltage　Switching(ZVS)　of　switches　can　be　used　to　minimize　the　switching　losses.　Finally,　according　to　the　simulation　platform　and　experimental　prototype,　it　can　be　shown　that　the　practical　voltage　gain　is　close　to　the　theoretical　design　gain　and　the　converter　has　good　boosting　performance.　©　2022　IEEE.