In　view　of　the　current　research　on　the　subsurface　damages　of　the　optical　lenses,　people　mainly　focused　on　the　process　parameters　and　abrasive　particle　size,　distribution,　and　et　al.　Based　on　the　theory　of　indentation　fracture　of　brittle　materials,　this　paper　analysed　a　series　of　processes　which　led　to　subsurface　damages　of　the　optical　lens,　and　then　finished　the　micro　dynamic　simulation　of　the　polishing　process　of　optical　lens　surfaces　under　the　different　sharpness　angles　of　the　grains,　and　with　the　same　load　and　the　different　processing　speeds.　Finley,　this　paper　obtained　the　frictional　contact,　the　stress　and　strain　distribution　and　subsurface　damages　between　abrasive　and　the　lens＇　surface.　The　relationship　among　the　relevant　parameters　of　the　subsurface　damage　depth　of　crack,　the　subsurface　damage　depth,　hole　volume　removal　rate,　surface　damage　rate,　abrasive　sharpness　angle　and　grinding　speed　was　summed　up.　When　the　grinding　grain　sharpness　angle　is　as　54~58　degrees,　the　processing　speed　is　as　7~8　m/s,　then　with　the　required　processing　efficiency　subsurface　damages　and　the　damage　rate　of　the　machined　lenses　are　of　the　minimum.　©　2016,　China　Mechanical　Engineering　Magazine　Office.　All　right　reserved.