Train tracking interval calculation method under moving block condition

The invention provides a train tracking interval calculation method under a moving block condition. The method comprises the steps that on the basis of a relative tracking model of a front train and a rear train under the moving block condition, the relation between the relative speed and the relative acceleration of the two trains from braking starting to braking ending is considered, an infrastructure microscopic road network model under the moving block condition is designed, and a train dynamic model suitable for the infrastructure microscopic road network model is constructed; and based on a moving block tracking rule and a basic working condition, calculating the minimum tracking interval of the train in the relative tracking mode by using the train dynamic model according to the relation between the relative speed and the relative acceleration. According to the method, calculation of the minimum tracking interval time in the single speed change process of the train under the relative tracking model is