In　view　of　the　practical　problem　of　wear　on　the　cage　pocket,　which　is　unavoidable　during　the　operation　of　high-speed　ball　bearing,　a　dynamic　model　of　high-speed　ball　bearing　with　flexible　cage　lintel　was　established　considering　the　cage-pocket　wear　loss　(BPWL),　the　gravity,　drag　force　from　the　oil,　and　the　hydrodynamic　effect　on　the　cage,　and　then,　the　dynamic　simulations　with　different　amounts　of　BPWL　were　obtained　by　solving　the　ball　bearing　dynamic　equations　using　varying　steps　Runge-Kutta　integration.　The　effect　of　the　BPWL　on　the　trajectory　of　the　cage＇s　centroid　and　cage　skidding　ratio　were　obtained.　The　computational　results　show　that　the　trajectory　of　the　cage＇s　centroid　presents　two　vibration　modes　with　different　amplitudes.　And　the　two　different　forms　of　trajectories　of　different　amplitudes　emerge　alternatively　with　BPWL　increase.　Moreover,　the　diameter　of　the　trajectory　decreases　significantly　with　the　BPWL　increasing　which　is　consistent　with　the　experimental　result.　The　change　of　the　BPWL　has　little　effect　on　the　average　skidding　ratio　of　the　cage;　however,　the　fluctuation　amplitude　would　become　larger　as　BPWL　increase.　This　study　can　provide　important　ideas　for　the　design　of　bearing　cage　pocket　size　and　the　fault　identification　of　the　ball　bearing.　©　2020　Elsevier　Ltd