Recently,　rubber　composites　reinforced　by　short　aramid　fiber　have　been　widely　used　in　fires　and　have　attracted　considerable　attention　because　of　their　excellent　characteristics.　In　this　study,　uniaxial　tests　and　scanning　electron　microscope　experiments　were　performed　to　obtain　the　mechanical　response　and　to　study　the　microscopic　structure　of　the　composites,　respectively.　A　finite　element　numerical　model　is　proposed　to　predict　the　mechanical　properties　of　rubber　composites　reinforced　by　short　aramid　fiber　based　on　experimental　observation.　Using　the　random　sequential　adsorption　algorithm,　fibers　were　generated　with　embedded　element　technique;　this　makes　finite　element　modeling　more　convenient　and　enables　the　analysis　of　two　key　issues:　the　large　aspect　ratio　of　the　aramid　fiber　and　large　deformation　of　the　rubber.　The　close　agreement　between　the　experimental　results　and　numerical　results　verifies　the　reliability　of　the　proposed　finite　element　model　for　aramid-fiber-reinforced　rubber.