In the researches and developments of speeding-up railway vehicles, it is necessary to carry out the collaborative MBS simulations on the wheel-rail relationship improvements and speeding-up bogie dynamical design, to transact correctly the dialectical relationship of (non-) linearities and maintain the ideal state of wheelset selfstability. The CRH5 bogies transform the rail parameters of rail cant from 1∶ 20 to 1∶ 40 by applying the XP55 tread alone, and the deficient safety and stability margin has therefore been an inherent problem since their technical importations and absorptions. However, the use of XP55 tread also brings many technical effects, such as widening of the low wear area to 16 mm and the probability reduction of local conformed contacts between worn wheel and rail. Under the frequent cross-wind disturbances, both wheel -rail matching and dynamic simulation analyses show that the grinding of rail head to 60N weakens the beneficial effects of the improved wheel-rail relationship design, which becomes then the direct cause of wear vibration problem produced by the anti-wind/sand trainsets, CRH5G. To enhance the stability and robustness against extreme climate influences, the optimal configuration scheme of anti-hunting parameters was formulated, defining clearly the CRH5 innovation or renovation direction.