A　proper　running-in　process　is　necessary　for　double　circular-arc　spiral　bevel　gears　to　achieve　desirable　meshing　performance.　However,　this　type　of　gear　transmission　lacks　a　suitable　running-in　wear　model,　which　brings　great　difficulties　to　the　design　of　appropriate　running-in　strategies.　To　address　this　problem,　the　present　study　establishes　an　efficient　numerical　wear　model　to　reveal　the　wear　behavior　of　double　circular-arc　spiral　bevel　gear　pairs,　based　on　which　a　step-wise　load　running-in　strategy　is　proposed.　The　established　Archard＇s　wear　model　considers　the　meshing　characteristics　of　double　circular-arc　spiral　bevel　gears　and　sets　a　small　threshold　value,　which　can　reflect　the　wear　behavior　of　this　gear　in　the　running-in　stage.　To　improve　the　computation　efficiency,　a　two-step　parameter　updating　strategy　is　proposed　to　enhance　the　iteration　of　p　and　s.　The　wear　simulation　reveals　the　quantitative　relationship　contact　pressure　and　running-in　cycle　during　the　running-in　process.　Based　on　the　reveal　relationship,　a　step-wise　load　running-in　strategy　is　proposed　to　sharpen　the　running-in　period.　The　developed　wear　model　and　the　proposed　running-in　strategy　can　be　extended　to　other　types　of　gears　with　circular-arc　profiles.　©　IMechE　2023.