In order to improve the stability of existing medium speed metro vehicles and save the space of low floor vehicles,and solve the problem that yaw damper cannot be installed due to the lack of remaining space and vehicle clearance limit,a yaw rotating damper suitable for railway vehicles was proposed.The slide damping valve system on the partition of the traditional rotating damper was changed to a low-cost plate damping valve,so that it was convenient to adjust the damping valve by increasing or reducing the number of valve plates to meet the throttling characteristics suitable for railway vehicles.Compared with the traditional cylindrical hydraulic damper of railway vehicles,the rotating damper has the advantages of reliable structure,better heat dissipation performance,small installation space and flexible installation.The mathematical model of rotating damper was established,and it was compared with the traditional yaw damper through experiment to ensure the accuracy of the rotating damper model,the dynamic co-simulation model of rotating damper and metro vehicle was established,and the influence of rotating damper on the dynamic performance of vehicle system was analyzed.The results show that the rotating damper can replace the yaw damper to provide rotating damping,so that the medium speed metro vehicle has better stability and stationarity,which can meet the requirements of curve passing at the same time.