Research method: Taken measures on the vibration comfort performance ,which is a special and important one in those factors correlated with comfort performance. The vertical and planar geometry state of the whole line denoted by the versine, and according to the relationship between the vertical and planar design parameter of railway and the train response , gained vertical and planar transition function of the train response，and then，via the calculation of root mean square of weighed acceleration，integrated ISO 2631 standard to carried through the riding comfort evaluation in the dynamics category of narrow sense.