This　study　aims　to　investigate　the　interfacial　mechanical　attributes　between　steel　fiber　and　the　ultra-high　performance　concrete　(UHPC)　matrix.　A　comprehensive　analysis　was　conducted　on　the　pull-out　process　of　steel　fiber　from　the　UHPC　matrix,　utilizing　both　experimental　and　numerical　simulation　methods.　Factors　such　as　fiber　embedding　depth,　fiber　diameter,　and　embedding　angle　and　their　potential　impacts　on　the　mechanical　properties　of　the　fiber-UHPC　interface　were　examined.　The　results　show　that　in　the　fiber　pull-out　test,　the　maximum　pull-out　force　of　the　embedded　depth　group　shows　a　trend　of　rapid　rise　and　then　slow　development,　and　the　pull-out　work　increases　with　the　increase　of　the　embedded　depth.　The　maximum　pull-out　force　and　pull-out　work　of　the　fiber　diameter　group　increase　with　the　increase　of　the　fiber　diameter.　The　maximum　pull-out　force　and　pull-out　work　of　the　embedded　angle　group　increased　first　and　then　decreased　with　the　increase　of　the　angle.　The　peak　load　reached　72.5　N　when　the　embedding　angle　was　45　degrees,　and　the　maximum　pull-out　work　reached　214.4　N　　mm　when　the　embedding　angle　was　30　degrees.　The　finite　element　simulation　results　are　in　good　agreement　with　the　experimental　results.