Method for positioning high-speed train in real time

The invention provides a method for positioning a high-speed train in real time. The method comprises the steps of: 1, data preprocessing, i.e. processing the real-time data which is acquired by a vehicle positioning system and calculating parameters of running distance, limit speed and time for speed change in a time interval and the like; 2, current train speed predetermining: adopting an acceleration mode or a pursuing mode to predetermine the current train speed; 3, current train mileage predicting: calculating the current train mileage according to the predetermined current train speed and the related data which is obtained in the step 1; and 4, building a line mileage-coordinate correlation model, and calculating mileage coordinates so as to position the train in real time.