This　research　investigated　the　mechanical　properties　of　ultra-high　performance　fiber　reinforced　cement-based　composite　(UHPFRC)　after　exposure　to　elevated　temperatures　ranging　from　200　to　300　°C.　The　cube　compressive　strength,　axial　compressive　strength,　and　flexural　strength　were　studied　with　150　specimens.　The　effects　of　volume　ratio　of　steel　fiber,　elevated　temperature,　and　high　temperature　duration　on　the　properties　of　UHPFRC　were　discussed　in　the　present　study.　The　result　indicated　that　the　compressive　strength　and　axial　compressive　strength　were　improved　after　the　UHPFRC　was　subjected　to　the　elevated　temperature.　However,　the　effect　of　elevated　temperature　was　not　significant　on　the　flexural　strength.　The　effects　of　steel　fiber　volume　ratio　on　the　properties　of　UHPFRC　were　obvious.　The　cube　compressive　strength,　axial　compressive　strength,　and　flexural　strength　were　greatly　improved　with　the　rising　of　steel　fiber　volume　ratio.　Furthermore,　the　calculation　formulas　of　the　cube　compressive　strength,　axial　compressive　strength,　and　flexural　strength　of　UHPFRC　were　proposed　in　this　presented　study.　The　calculated　results　were　compared　with　the　test　results,　which　indicated　that　the　calculated　formulas　were　greatly　agreed　with　the　test.　©　2022