Dynamic railroad track scale capable of deciding vehicle position

The utility model relates to a dynamic railroad track scale which can determine the direction of a coming vehicle, belonging to a dynamic rail device that determines the direction of the coming vehicle by displacing a weighing rail. The utility model primarily settles such technical problems related to prior weighing rails as expensive installation of a recognizer and easy to encounter errors in installation. The dynamic railroad track scale that determines the direction of the coming vehicle includes a base and two rail weighing sensors and an electronic weighting system that determines the direction of the coming vehicle and includes an amplifier, an analog to digital converter circuit, a calculation recognizer and a peripheral equipment, wherein, the two rail weighing sensors are misplaced on the base and are put in relation to an approach rail; the output terminal of each rail weighing sensor connects to the input terminal of the amplifier to form independent weighing signal which is sent to the calculation recognizer by means of the amplifier and the analog to digital converter circuit in order to determine the direction of the coming vehicle and weigh the vehicle.