This　paper　presents　a　single-stage　three-phase　large　boost　ratio　current-type　PV　grid-connected　inverter　based　on　space　vector　pulse　width　modulation　and　its　two-loop　control　strategy　with　feedback　of　input-side　PV　current　and　output-side　grid-connected　current,　and　analyzes　and　studies　the　circuit　topology　that　constitute　this　inverter,　space　vectors　corresponding　to　circuit　modes,　modulation　strategy,　control　strategy,　design　of　key　circuit　parameters,　and　simulation.　The　inverter　mainly　consists　of　an　energy　storage　inductor　with　a　center　tap,　a　current-type　three-phase　inverter　bridge　and　output　CL　filter.　The　110VDC/380V　50Hz　3-AC　inverter　is　designed,　and　the　simulation　results　show　that　the　inverter　has　the　advantages　of　strong　boost　capability　and　low　harmonic　content　of　grid-connected　current.　©　2021　IEEE.