This　paper　investigates　the　multi-pulse　global　heteroclinic　bifurcations　and　chaotic　dynamics　for　nonlinear,　nonplanar　oscillations　of　the　parametrically　excited　viscoelastic　moving　belts　by　using　an　extended　Melnikov　method　in　the　resonant　case.　Applying　the　method　of　multiple　scales,　the　Galerkin＇s　approach　and　the　theory　of　normal　form,　the　explicit　normal　form　is　obtained　for　the　case　of　1:1　internal　resonance　and　primary　parametric　resonance.　Studies　are　performed　for　the　heteroclinic　bifurcations　of　the　unperturbed　system　and　for　the　characteristics　of　the　hyperbolic　dynamics　of　the　dissipative　system,　respectively.　The　extended　Melnikov　method　is　used　to　investigate　the　Shilnikov　type　multi-pulse　bifurcations　and　chaotic　dynamics　of　the　viscoelastic　moving　belt.　Based　on　the　investigation,　the　geometric　structure　of　the　multi-pulse　orbits　is　described　in　the　four-dimensional　phase　space.　Numerical　simulations　show　that　the　Shilnikov　type　multi-pulse　chaotic　motions　can　occur.　Furthermore,　numerical　simulations　lead　to　the　discovery　of　the　new　shapes　of　chaotic　motion.　Overall,　both　theoretical　and　numerical　studies　suggest　that　chaos　for　the　Smale　horseshoe　sense　in　motion　exists.