The　multipulse　Shilnikov　orbits　and　chaotic　dynamics　for　the　nonlinear　nonplanar　oscillations　of　a　cantilever　beam　are　studied　in　this　paper　for　the　first　time.　The　cantilever　beam　studied　here　is　subjected　to　a　harmonic　axial　excitation　and　two　transverse　excitations　at　the　free　end.　The　nonlinear　governing　equations　of　nonplanar　motion　with　parametric　and　external　excitations　are　obtained.　The　Galerkin　procedure　is　applied　to　the　partial　differential　governing　equations　to　obtain　a　two-degree-of-freedom　nonlinear　system　under　combined　parametric　and　forcing　excitations.　The　resonant　case　considered　here　is　principal　parametric　resonance-1/2　subharmonic　resonance　for　the　first　mode　and　fundamental　parametric　resonance-primary　resonance　for　the　second　mode.　The　parametrically　and　externally　excited　system　is　transformed　to　the　averaged　equation　by　using　the　method　of　multiple　scales.　From　the　averaged　equation,　the　theory　of　normal　form　is　used　to　find　their　explicit　formulas.　Based　on　normal　form　obtained　above,　the　dissipative　version　of　the　energy-phase　method　is　utilized　to　analyze　the　multipulse　global　bifurcations　and　chaotic　dynamics　for　the　nonlinear　nonplanar　oscillations　of　the　cantilever　beam.　The　energy-phase　method　is　further　improved　to　ensure　the　equivalence　of　topological　structure　for　the　phase　portraits.　The　analysis　of　global　dynamics　indicates　that　there　exist,　the　multipulse　jumping　orbits　in　the　perturbed　phase　space　of　the　averaged　equation　for　the　nonlinear　nonplanar　oscillations　of　the　cantilever　beam.　These　results　show　that　the　multipulse　Shilnikov　type　chaotic　motions　can　occur　for　the　nonlinear　nonplanar　oscillations　of　the　cantilever　beam.　Numerical　simulations　are　given　to　verify　the　analytical　predictions.　It　is　also　found　from　the　results　of　numerical　simulation　in　three-dimensional　phase　space　that　the　multipulse　Shilnikov　type　orbits　exist　for　the　nonlinear　nonplanar　oscillations　of　the　cantilever　beam.