With　the　rapid　development　of　the　machinery　industry,　bearing　materials　with　better　tribological　properties　are　demanded.　Al　alloys　containing　Erbium　(Er)　and　Zirconium　(Zr)　have　better　comprehensive　performance,　whose　tribological　properties　have　hardly　been　reported　before.　In　this　work,　dry　sliding　wear　tests　were　performed　on　the　Al-Sn　and　Al-Sn-Er-Zr　alloys　in　two　different　annealing　states　to　study　the　effect　of　trace　Er,　Zr　on　the　tribological　properties　of　the　Al-Sn　alloys.　The　Al-Sn-Er-Zr　alloys　showed　better　wear　resistance　than　the　Al-Sn　alloys,　which　was　mainly　due　to　the　higher　hardness　and　strength　of　the　Al-Sn-Er-Zr　alloys.　The　wear　losses　of　the　alloys　annealed　at　375　degrees　C　for　100　h　at　the　load　of　70　N　were　significantly　lower　than　those　of　the　alloys　annealed　at　300　degrees　C　for　4　h.　The　wear　coefficient　K　of　the　alloys　annealed　at　375　degrees　C　for　100　h　decreased　with　the　increasing　load.　The　Al-Sn-Er-Zr　alloys　showed　smoother　worn　surfaces　than　the　Al-Sn　alloys.　With　the　load　increasing,　the　wear　mechanism　changed　from　abrasive　wear,　mild　adhesive　wear　and　slight　delamination　wear　to　severe　adhesive　wear　and　delamination　wear.　The　wear　scars　of　different　samples　under　the　same　load　were　similar,　indicating　that　the　addition　of　trace　Er,　Zr　and　annealing　process　did　not　change　the　wear　mechanism.　All　samples　experienced　cracks　and　voids　in　the　tribolayers.　And　oxygen　accumulated　in　these　defects.　Most　wear　debris　were　lamellar,　which　was　related　to　the　adhesive　wear　and　consist　with　the　delamination　theory.　(C)　2020　The　Authors.　Published　by　Elsevier　B.V.