Steel　fiber　reinforced　concrete　(SFRC)　is　an　appropriate　material　for　protective　structure　and　may　undergo　fire,　impact　and　the　coupled　effects　of　them.　To　investigate　the　dynamic　failure　behavior　of　SFRC　after　elevated　temperature,　a　mesoscale　simulation　method　was　established.　In　the　approach,　the　SFRC　was　regarded　as　a　four-phase　composite　material　consisting　of　aggregate　particles,　mortar　matrix　and　the　interfacial　transition　zones　between　them　as　well　as　fibers.　Each　phase　has　its　own　independent　thermal　and　mechanical　properties.　During　the　simulations,　a　sequentially　coupled　thermal-stress　procedure　was　employed.　In　detail,　thermal　conduction　within　SFRC　specimens　was　conducted　firstly.　Then,　taking　the　results　of　damage　and　temperature　field　as　the　initial　state,　the　dynamic　failure　behavior　of　SFRC　under　uniaxial　compression　was　modelled.　Comparison　between　simulation　results　and　experimental　observations　reveals　the　rationality　and　accuracy　of　the　simulation　method.　Based　on　the　calibrated　simulation　approach,　the　mechanical　performances　of　SFRC　under　various　temperature　and　strain　rates　were　simulated.　Both　the　temperature　degradation　and　strain　rate　enhancement　effects　on　the　apparent　property　of　SFRC　were　studied.　The　results　indicate　that　steel　fiber　can　effectively　improve　the　dynamic　mechanical　properties　of　concrete　after　high　temperature　and　more　adequately　prevent　crack　evolution　under　high　strain　rate.　The　fiber　enhancement　effect　on　strength　is　weakened　with　the　increase　of　strain　rate,　while　that　is　more　significant　with　the　increase　of　temperature.