A　microbistable　piezoelectric　energy　harvester　has　been　developed.　The　harvester　was　based　on　a　center-fixed　and　quadrilateral-free　microbistable　plate　with　mass　blocks　placed　at　the　four　corners.　Considering　the　thermoelectromechanical　coupling　effect,　a　nonlinear　oscillation　differential　equation　was　established　by　Hamilton＇s　principle.　Strain　gradient　theory　was　applied　to　consider　the　size　effect,　and　von　Karman　theory　was　used　to　consider　the　large　deformation　effect.　The　influences　of　the　laying　position　and　area　of　the　piezoelectric　layer　on　the　efficiency　of　energy　capture　were　investigated.　The　voltage-frequency　response　of　the　nonlinear　system　was　investigated,　and　the　snap-through　behavior　of　the　bistable　plate　results　in　energy　harvesting　achieving　the　ideal　broaden　frequency　range　before　the　resonance　region.