The invention discloses a method for tracking a train set of a motor train unit in real time. The method comprises the following steps of: acquiring the position information of a red light strip on a railway yard graph which is used for representing a station line relationship, wherein the red light strip represents that an area is occupied by the motor train unit; matching the position of the red light strip and a current operation plan of the position, and if the matching succeeds, setting the serial number of the motor train unit which executes the operation plan as the serial number of the motor train unit, which corresponds to the red light strip; reflecting the movement locus of the motor train unit in a station according to the movement locus of the red light strip on the railway yard graph; when the serial number of the motor train unit is determined, binding the serial number and the red light strip which corresponds to the motor train unit; and according to the position of the red light strip, acquiring an execution schedule of the operation plan of the motor train unit. By the adoption of the method provided by the invention, the tracking accuracy of the train set of the motor train unit is high, dependence on an external system is reduced, and the reliability of a system is ensured.