Combining with comprehensive test on the pilot section of Beijing-Shanghai high-speed railway and focusing on the structural key parts of the both ends of end thorns adjacent to the connection position of road and bridge structure,the vibration characteristics test on CRTSⅡ slab ballastless track bridge-subgrade transition were developed. The spatially changing characteristics of vibration response in the longitudinal and vertical direction and the relationship between train speed and vibration response were analyzed.The test study results show in the longitudinal direction,the maximum value of vibration response is located at the junction of the end thorns transition board and the subgrade bearing layer.It indicates that the supporting stiffness of the former is less than that of the latter and reflects that the end thorns transition board has not been designed perfectly to achieve gradual transition from high to low stiffness.On the vertical multi-storey structure layers,the vibration response is relatively large when the horizontal direction structure is of discontinuity and shows a decreasing trend along the depth,but the vibration characteristics are significantly improved when the track slabs are longitudinally connected.With the train speed increased,the vibration displacement shows a linear increase,while the vibration velocity and vibration acceleration hold the rule of nonlinear accelerated increase.%结合京沪高铁先导段综合试验，针对端刺结构两端与相邻路桥结构连接的关键部位，开展了CRTSⅡ型板式无砟轨道路桥过渡段振动特性测试，分析了振动响应沿线路纵垂向的空间变化特征及与行车速度的关系。试验表明：①沿线路纵向的振动响应最大值出现在过渡板端与路基支承层交接处，并呈现出前者支承刚度小于后者的现象，反映出端刺结构的过渡板设置未能较好地实现刚度由高至低的逐渐过渡；②垂向多层的线路结构振动响应沿深度呈递减趋势，结构各层位水平向不连续引起的振动响应表现出与轮轨作用处距离成反比的关系，轨道板端经纵联后的振动特性有显著改善；③随车速的提高，振动位移表现出线性增加、振动速度与振动加速度呈现出非线性加速增大的规律。
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