Ultra-high　performance　fiber　reinforcement　concrete　containing　stone　powder　(SP-UHPFRC)　is　a　kind　of　ultra-high　performance　fiber　reinforcement　concrete　(UHPFRC)　prepared　by　using　stone　powder　waste　from　stone　processing　instead　of　quartz　powder.　It　can　reduce　the　waste　of　land　resources　and　environmental　pollution　caused　by　stone　powder　accumulation　in　corresponding　areas.　This　research　studies　the　steel　fiber　reinforcement　mechanism　and　uniaxial　tension　constitutive　relationship　of　UHPFRC　containing　stone　powder　(SP-UHPFRC)　from　several　scales.　In　the　micro-scale,　comparing　the　results　of　SEM　and　XRD　of　SP-UHPFRC　and　UHPFRC.　it　can　be　found　that　the　influence　of　adding　stone　powder　in　the　micro-scale　of　SP-UHPFRC　is　mainly　manifested　in　the　change　of　microstructure.　After　adding　stone　powder,　the　hydration　products　adsorb　on　the　stone　powder　to　form　particles,　which　leads　to　a　decrease　in　the　compactness　of　the　matrix,　and　the　spalling　phenomenon　of　the　matrix　is　more　obvious　when　the　steel　fiber　is　pulled　out.　In　the　meso-scale,　the　pullout　test　of　steel　fibers　with　different　aspect　ratio　from　the　SP-UHPFRC　matrix　was　tested.　The　results　shown　that　as　the　aspect　ratio　of　steel　fiber　increases,　both　the　maximum　pullout　stress　and　the　tensile　strength　utilization　ratio　of　steel　fiber　increase　as　well.　In　the　macro-small-scale,　18　groups　of　SP-UHPFRC　uniaxial　tensile　test　specimens　with　3　kinds　of　aspect　ratios　and　6　volume　fractions　of　steel　fiber　were　designed.　The　effects　of　steel　fiber　on　the　uniaxial　tensile　properties　and　constitutive　relationship　were　investigated.　The　SP-UHPFRC　uniaxial　tensile　constitutive　relationship　equation　including　the　fiber　reinforcement　factor　is　proposed　and　verified.　In　the　macro-large-scale,　the　applicability　of　the　uniaxial　tensile　constitutive　relationship　in　macro-large-scale　analysis　is　discussed　by　comparing　the　cracking　load　of　finite　element　simulation　established　by　using　the　uniaxial　tension　constitutive　relationship　proposed　in　this　paper　with　the　test　results　of　SP-UHPFRC　beams.　©　2024　Elsevier　Ltd