Rocking　bridge　piers　can　exhibit　minor　damage　and　residual　displacements,　displaying　superior　post-earthquake　performance.　The　rocking　response　of　a　double-column　rocking　bridge　system,　enhanced　with　elastic　prestressed　central　tendons,　was　investigated.　Following　the　Lagrange　equation　and　momentum　conservation　law,　a　dynamic　analytical　model　was　derived,　where　the　effects　of　the　prestressing　force　of　the　tendons　were　considered.　The　analytical　model　was　used　to　construct　the　rocking　spectrum　of　the　post-tensioned　double-column　rocking　bridge　system　under　pulse-type　ground　motions.　The　results　show　that　the　post-tensioned　tendons　are　effective　in　reducing　the　response　of　the　double-column　rocking　bridge　with　small　columns　when　subjected　to　long　period　excitations.　With　the　increase　of　the　size　of　the　column　or　the　frequency　of　the　excitation,　the　influence　of　the　tendons　on　the　rocking　response　becomes　marginal,　whereas　the　bridge　pier　mainly　depends　on　the　rotational　inertia　of　their　columns　to　resist　the　earthquake　action.　Rocking　bridge　systems　with　negative　stiffness,　which　can　effectively　avoid　the　collapse　of　the　pier　without　inducing　local　damage　at　pivoting　points,　can　be　used　in　the　seismic　design　of　double-column　rocking　bridge　systems.　©　2022,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.