To　eliminate　the　contact　stress　of　the　traditional　loading　pad　of　load　cell　and　enhance　the　accuracy　and　longtime　stability　of　the　load　cell,　a　loading　pad　of　surface　to　surface　contact　form　with　bearing　ball　was　designed.　The　contrast　experiment　was　carried　out　to　verify　its　performance.　The　testing　results　of　a　20　MN　force　transducer　with　the　loading　pad　showed　that　the　repeatability　error　and　position　error　was　less　than　0.005%　and　0.04%,　respectively.　The　loading　pad　of　surface　to　surface　contact　form　with　bearing　ball　was　confirmed　with　better　specification　compared　with　the　loading　pad　of　surface　to　surface　contact　form　without　bearing　ball.　With　smaller　frictional　resistance,　the　ball　could　rotate　itself　around　the　cup　to　compensate　the　angular　misalignment　between　the　upper　and　bottom　contact　platen　of　the　load　cell.　It　would　uniform　the　outputs　of　the　load　cell　loaded　in　different　positions　and　get　better　position　error.　Besides　that,　the　contact　stress　of　this　style　loading　pad　was　much　low,　which　made　the　loading　pad　strong　enough　to　bear　large　load.　©　2020,　Acta　Metrologica　Sinica　Press.　All　right　reserved.