The　multi-pulse　homoclinic　orbits　and　chaotic　dynamics　of　an　equivalent　circular　cylindrical　shell　for　the　circular　mesh　antenna　are　investigated　in　the　case　of　1:2　internal　resonance　in　this　paper　for　the　first　time.　Applying　the　method　of　averaging,　the　four-dimensional　averaged　equation　in　the　Cartesian　form　is　obtained.　The　theory　of　normal　form　is　used　to　reduce　the　averaged　equation　to　a　simpler　form.　Based　on　the　simplified　system,　the　energy　phase　method　is　employed　to　investigate　the　homoclinic　bifurcations　and　the　Shilnikov　type　multi-pulse　chaotic　dynamics.　First,　the　energy　difference　function　and　the　zeroes　of　the　energy　difference　function　are　obtained.　Then,　the　existence　of　the　Shilnikov　type　multi-pulse　orbits　is　determined.　The　homoclinic　trees　are　depicted　to　describe　the　relationship　among　the　layers　diameter,　the　pulse　numbers　and　the　phase　shift.　Finally,　we　need　to　verify　the　condition　which　makes　sure　that　any　multi-pulse　orbit　departing　from　a　slow　sink　comes　back　to　the　domain　of　attraction　of　one　of　the　sinks.　The　results　obtained　here　show　the　existence　of　the　Shilnikov　type　multi-pulse　chaotic　motions　of　the　circular　mesh　antenna.　Numerical　simulations　are　used　to　find　multi-pulse　chaotic　motions.　The　results　of　the　theoretical　analysis　are　in　qualitative　agreement　with　the　results　obtained　using　numerical　simulation.