This　paper　presents　an　experimental　investigation　on　the　bistable　piezoelectric　electromagnetic　combined　energy　harvester　based　on　vibration.　The　end　of　the　piezoelectric　cantilever　beam　has　a　tip　magnet.　The　opposite　of　the　piezoelectric　cantilever　beam　has　a　coil,　a　spring　and　a　magnet.　The　power　generation　efficiency　and　dynamic　behaviors　for　three　different　kinds　of　the　piezoelectric　cantilever　beam　structures　are　experimentally　studied,　such　as　the　conventional　piezoelectric　cantilever　beam,　the　bistable　piezoelectric　cantilever　beam　introduced　spring　and　magnet,　and　the　bistable　piezoelectric　cantilever　beam　introduced　spring,　magnet　and　coil.　Experimental　results　show　that　the　introduction　of　the　spring　and　magnet　improves　the　maximum　output　voltage　and　broaden　the　effective　frequency　bandwidth.　The　power　generation　efficiency　of　the　system　is　improved　by　adding　the　coil.　Complicated　nonlinear　dynamic　behaviors　occur　in　the　system,　when　the　spring　and　the　magnet　are　introduced.　These　nonlinear　dynamic　behaviors　broaden　the　effective　frequency　bandwidth.