The　application　of　geopolymer　has　great　potential　in　repairing　damaged　concrete.　In　engineering　construction,　the　repaired　structure　is　often　affected　by　dynamic　loading.　Experimental　research　on　the　dynamic　mechanical　behavior　and　energy　dissipation　of　geopolymer-concrete　composites　(GCC)　is　of　great　significance　for　understanding　the　bonding　performance　between　geopolymer　and　concrete.　In　this　paper,　dynamic　splitting　experiment　was　performed　on　GCC　under　different　interface　inclination　angles　and　load　impact　velocities　by　using　the　split　Hopkinson　pressure　bar　(SHPB).　Then,　the　influence　of　interface　inclination　angle　and　load　impact　velocity　on　dynamic　splitting　tensile　behavior　and　dissipated　energy　of　GCC　were　discussed.　Finally,　the　failure　modes　and　strain　field　were　analyzed　based　on　digital　image　correlation　(DIC)　technique.　The　results　indicate　that　the　static　peak　load　of　GCC　is　roughly　distributed　around　26.0　kN　and　the　dynamic　peak　load　is　263.0　kN.　The　dynamic　peak　load　measured　by　GCC　is　more　than　10　times　the　static　peak　load.　As　the　interface　inclination　angle　increases　from　0　degrees　to　90　degrees,　the　dynamic　peak　load,　static　peak　load　and　energy　dissipation　rate　increase　linearly,　while　the　tensile　sensitivity　coefficient　decreases.　The　energy　dissipation　ratio　of　GCC　is　kept　between　0.30　and　0.40.　In　addition,　the　dynamic　peak　load,　tensile　sensitivity　coefficient　and　dissipated　energy　increase　gradually　as　the　load　impact　velocity　increases.　A　transition　from　interface　failure　to　tensile　failure　can　be　found　in　GCC　with　the　inclination　angle　increases.