To　study　the　dynamic　splitting　tensile　fracture　behaviors　of　concrete　at　elevated　temperatures,　the　numerical　meso-scale　model　and　method　are　established　by　considering　the　coupling　effects　of　the　high　temperature　degradation　and　strain　rate　enhancement　of　the　mechanical　properties,　and　combining　with　the　internal　heterogeneities　of　concrete　materials.　The　simulation　method　is　divided　into　two　steps:　the　heat　conduction　behavior　is　first　simulated,　then　the　output　results　areused　as　the　initial　conditions　to　simulate　the　dynamic　splitting　tensile　behaviors　of　the　concrete.　Based　on　the　good　agreement　between　the　numerical　simulation　results　and　the　experimental　phenomenon,　the　dynamic　splitting　tensile　behaviors　and　meso-scale　failure　mechanism　of　the　concrete　at　elevated　temperature　are　analyzed,　the　splitting　tensile　stress-strain　relations　of　the　concrete　at　different　strain　rates　and　high　temperatures　are　compared,　and　the　interacting　regulation　between　the　temperature　degradation　and　the　strain　rate　effect　of　concrete　is　revealed.　The　results　prove　that:　(1)　after　high　temperature,　the　damage　area　in　the　concrete　is　more　concentrated;　(2)　the　destructed　process　becomes　more　rapid　as　the　nominal　strain　rate　is　higher,　the　aggregation　is　destroyed　at　room　temperature;　(3)　the　internal　stress　appears　date-shaped　distributions　due　to　the　heterogeneities　of　the　concrete　microstructures;　(4)　the　temperature　degradation　effects　on　the　splitting　tensile　strength　of　the　concrete　is　more　dramatic　comparing　with　the　strain　rate　effects.　©　2020,　Editorial　Staff　of　EXPLOSION　AND　SHOCK　WAVES.　All　right　reserved.