The invention provides an analysis system of traffic safety of a rail vehicle. The analysis system of the traffic safety is used to calculate the upper limit of the traffic rate of the rail vehicle according to the rail parameters, the vehicle parameters, the wind parameters, and the seismic force parameters, and is used to guarantee the traffic safety of the rail vehicle with respect to the upper limit of the surface acceleration of the rail vehicle or the upper limit of the wind speed of the rail vehicle, and therefore the derail is prevented.