Based　on　multi-module-cascaded　inverter　topology,　a　universal　hybrid　multilevel　inverter　structure　is　introduced　in　this　paper　and　the　research　on　multilevel　inverter　structure　is　unified.　According　to　the　free　degree　of　this　universal　topology,　several　new　hybrid　topologies　are　constructed.　At　the　same　time,　based　on　conventional　modulation　strategies-multi-carrier　SPWM　(Sinusoidal　Pulse　Width　Modulation),　hybrid　modulation　strategies　are　introduced.　Corresponding　to　hybrid　topologies,　a　multilevel　SVPWM　(Space　Vector　Pulse　Width　Modulation)　technique　based　on　phase-shift　theory　is　naturally　produced.　The　simulation　and　experiment　results　prove　the　validity　of　hybrid　topologies　and　corresponding　modulation　strategies,　which　lays　the　foundation　of　practical　application　of　hybrid　multilevel　inverter　structure.