Under　weak-grid　condition,　the　mismatch　degree　between　grid　impedance　and　inverter　output　impedance　can　increase,　which　will　lead　to　inverter　instability.　Compared　with　conventional　power　grid,　the　parallel　resonance　of　multi-inverter　parallel　system　is　more　likely　to　happen.　In　order　to　improve　inverter　stability　and　suppress　multiple-inverter　parallel　resonance　under　weak-grid　condition,　a　new　generalized　control　mode　for　control　layer　is　proposed　in　this　paper,　which　is　based　on　finite　set　model　predictive　control　(FCS-MPC)　and　inverse　dynamic　model　control　(IDM).　The　FCS-MPC　with　delay　compensation　is　introduced　into　the　current　inner　loop　of　the　control　layer,　and　the　IDM　control　is　introduced　into　the　voltage　outer　loop,　so　as　to　make　the　transfer　functions　of　current　inner　loop　and　voltage　outer　loop　unitized　and　further　reduce　the　order　of　the　inverter＇s　control　system.　Order　reduction　can　improve　the　phase　margin　of　the　inverter　output　impedance,　in　other　words,　enhance　inverter　dynamic　performance.　Finally,　the　simulation　model　of　multi-inverter　parallel　system　is　built,　and　by　comparing　with　the　traditional　control　strategies,　the　effectiveness　of　the　proposed　control　strategy　is　verified.　©　2023　The　Author(s)