The　current　seismic　vulnerability　analysis　of　reinforced　concrete　bridge　is　generally　carried　out　by　analyzing　the　typical　local　component,　and　the　static　parameters　such　as　bridge　pier　cross-section　curvature　are　calculated,　which　cannot　involve　the　effect　of　the　durability　on　the　structural　performance.　Thus,　the　traditional　method　has　certain　limitations.　A　bridge　seismic　vulnerability　analysis　method　based　on　time-dependent　periods　is　presented　and　the　multidimensional　and　integral　vulnerability　of　complex　bridge　can　be　calculated.　The　finite　element　models　of　RC　bridge　with　different　ages　are　established　by　modifying　the　cohesive　force　of　steel　bars　and　section　area,　and　the　effect　of　durability　on　the　vulnerability　is　estimated.　Based　on　the　vulnerability　analysis　of　bridge　periods　and　curvature　of　piers,　the　comprehensive　time-dependent　seismic　vulnerability　analysis　method　considering　the　influence　of　reinforcement　corrosion　is　established.　According　to　a　typical　model　analysis,　it　is　verified　that　the　damage　value　and　the　time-dependent　seismic　vulnerability　based　on　periods　can　accurately　reveal　the　damage　evolution　process　of　the　total　bridge,　and　the　function　on　the　damage　value　ratio　can　represent　the　time-dependent　effect　for　the　bridge　with　different　service　ages.　©　2018,　The　Editorial　Board　of　Journal　of　Basic　Science　and　Engineering.　All　right　reserved.