A kind of fixed spine nails lever apparatus of dynamic, it includes: a spine nails group has a U-lag socket end comprising a nail piece, can accommodate a screw tightening and be screwed into； One connecting rod accommodates and by screw tightening packing connection what nail piece U-lag； Its characteristic is in what: in two side enclosure wall of U-lag and slot bottom, recessed space accommodates an elastomer, which contacts the grade elastomers, which, which is screwed into packing, makes have elastomeric resilient buffering between the connecting rod and nail piece.一種動態固定脊椎釘桿裝置，其包含：一脊椎釘組，包含一釘件具一U形槽承接端，可容置一螺固件螺入；一連結桿，容置及受該螺固件迫緊連結於該釘件U形槽中；其特徵在於：該U形槽兩側圍壁內及槽底，均凹設一空間容置一彈性體，該連結桿接觸該等彈性體，該螺固件螺入迫緊使該連結桿與釘件間具該彈性體彈性緩衝。
