Attaching　a　rigid　frame　to　two　cantilever　plates,　a　compact　piezoelectric　energy　harvester　(PEH)　with　wide　bandwidth　is　proposed　in　this　paper.　Three　different　arrangement　form　and　section　shape　of　the　two　cantilever　plates,　such　as,　symmetrical　uniform　section　rectangle,　symmetrical　variable　section　trapezoid　and　anti-symmetrical　variable　section　are　designed.　Considering　the　frame　as　a　rigid　body　and　the　cantilever　plate　as　a　deformed　body,　natural　frequencies,　modes　and　output　voltages　of　the　structures　are　calculated　using　finite　element　software　ABAQUS.　It　is　found　that　the　anti-symmetrical　trapezoidal　cantilever　plate　surrounded　by　rigid　frame,　has　lower　natural　frequency,　more　working　frequency　bands　in　low　frequency　range　and　the　highest　output　voltage.　According　to　the　simulation　results,　prototype　of　PEH　with　anti-symmetrical　trapezoidal　cantilever　plate　surrounded　by　rigid　frame　is　processed　and　fixed　to　the　vibration　platform　using　custom　fixture.　Through　sweep　test,　open-circuit　output　voltage　of　PEH　at　different　frequencies　is　measured　using　oscilloscope　and　the　first　three　order　natural　frequencies　are　obtained.　The　results　meets　the　design　requirements　of　multilevel　natural　frequency　and　high　output　voltage　in　low　frequency　range.　This　research　provides　theoretical　and　experimental　basis　for　the　engineering　application　of　the　PEH.