The　Quasi-Z　source　inverter　was　a　newly　proposed　circuit　topology　in　recent　years,　which　was　developed　from　Z　source　inverter.　Due　to　the　so　many　advantages,　It　has　important　research　value　and　broad　application　prospects　in　the　renewable　Energy　field　of　PV　and　fuel　cell　.　The　circuit　strategy　and　feature　is　analyzed　in　this　paper.　This　paper　also　focus　on　the　novel　circuit　topology,　control　strategy　and　modeling　of　this　inverter.　A　simulation　example　was　given　to　verify　the　above　analysis.　©　2013　IEEE.