Base-isolated　structures　with　general　rubber　bearings　may　impact　adjacent　buildings　easily　due　to　the　excessive　horizontal　displacements　under　strong　earthquake.　Here,　using　nonlinear　pounding　element,　a　pounding　model　of　adjacent　isolated　structures　with　prestressed　rubber　bearings　(PRBs)　was　built,　and　the　pounding　dynamic　equation　was　deduced.　On　this　basis,　the　influence　of　prestressed　rubber　bearings　(PRBs)　on　the　pounding　of　adjacent　isolated　structures　was　studied,　and　the　influencing　factors　of　pounding　is　analysed.　The　results　showed　that　compared　to　general　RB,　PRB　can　reduce　effectively　the　horizontal　displacements　of　isolated　structures,　and　diminish　the　pounding　responses　of　adjacent　structures.