In　high　current　vacuum　arcs,　the　contact　materials　fundamentally　decide　the　arc　behavior.　The　objective　of　this　work　is　to　experimentally　study　the　influence　of　anode　contact　materials　on　the　anode　spot　formation.　A　pair　of　Helmholtz　coils　is　set　to　generate　axial　magnetic　fields.　A　high　speed　video　camera　is　used　to　record　the　arc　evolution.　The　anode　spot　formation　and　the　threshold　currents　for　different　anode　materials　are　studied.　To　eliminate　other　factors　that　may　affect　the　anode　spot　formation.　The　discharge　geometry　and　the　external　axial　magnetic　field　remain　the　same.　In　the　experiments,　four　anode　contact　materials　of　Fe,　Cr,　Mo　and　W　are　used.　Moreover,　the　cathode　material　remains　Cu.　Therefore,　four　cathode-anode　materials　sets　are　Cu-Fe,　Cu-Cr,　Cu-Mo　and　Cu-W.　The　anode　spot　threshold　currents　for　these　four　materials　sets　are　9.5　kArms,　11.2　kArms,　14.1　kArms　and　16.3　kArms,　respectively.　Compared　to　the　previous　work,　the　impact　of　cathode　materials　is　eliminated.　The　experimental　results　could　directly　reflect　the　influence　of　the　anode　materials　on　the　anode　spot　formation.　©　2022　IEEE.