In　this　paper,　the　Shilnikov　type　multi-pulse　orbits　and　chaotic　dynamics　of　parametrically　excited　viscoelastic　moving　belt　are　studied　in　detail.　Using　Kelvin-type　viscoelastic　constitutive　law,　the　equations　of　motion　for　viscoelastic　moving　belt　with　the　external　damping　and　parametric　excitation　are　given.　The　four-dimensional　averaged　equation　under　the　case　of　primary　parametric　resonance　is　obtained　by　directly　using　the　method　of　multiple　scales　and　Galerkin＇s　approach　to　the　partial　differential　governing　equation　of　viscoelastic　moving　belt.　From　the　averaged　equations　obtained　here,　the　theory　of　normal　form　is　used　to　give　the　explicit　expressions　of　normal　form　with　a　double　zero　and　a　pair　of　pure　imaginary　eigenvalues.　Based　on　normal　form,　the　energy-phrase　method　is　employed　to　analyze　the　global　bifurcations　and　chaotic　dynamics　in　parametrically　excited　viscoelastic　moving　belt.　The　global　bifurcation　analysis　indicates　that　there　exist　the　heteroclinic　bifurcations　and　the　Silnikov　type　multi-pulse　homoclinic　orbits　in　the　averaged　equation.　The　results　obtained　above　mean　the　existence　of　the　chaos　for　the　Smale　horseshoe　sense　in　parametrically　excited　viscoelastic　moving　belt.　The　chaotic　motions　of　viscoelastic　moving　belts　are　also　found　by　using　numerical　simulation.　A　new　phenomenon　on　the　multi-pulse　jumping　orbits　is　observed　from　three-dimensional　phase　space.　(c)　2005　Elsevier　Ltd.　All　rights　reserved.