To　avoid　welding　on　a　construction　site,　this　paper　proposes　a　novel　resilient　prefabricated　steel　frame　with　all-bolted　beam-to-column　connections　(ABRPSF),　which　is　optimized　based　on　a　resilient　prefabricated　steel　frame　with　mixed　welded　and　bolted　beam-to-column　connections　(WBRPSF)　that　was　proposed　and　investigated　in　a　previous　study.　Four-story,　3　x　5　bay　prototype　structures　of　the　ABRPSF　and　WBRPSF　are　designed,　and　their　substructures　are　used　to　conduct　pseudo-dynamic　tests,　whose　results　are　then　compared　to　investigate　the　seismic　behavior　of　ABRPSFs.　The　results　indicate　that　the　seismic　behavior　and　recentering　capacity　of　a　new　structural　system　composed　of　ABRPSFs　are　similar　to　those　of　WBRPSFs;　in　addition,　the　ABRPSF　improves　the　assembly　efficiency　significantly　and　can　be　adopted　as　a　reliable　alternative　to　the　WBRPSF.　Copyright　(C)　2020　by　The　Hong　Kong　Institute　of　Steel　Construction.　All　rights　reserved.