Train body total mass measuring system and method

The invention provides a train body total mass measuring system. The train body total mass measuring system comprises a force measuring sensor, a speed sensor, an acceleration sensor, a satellite positioning unit and a vehicle-mounted computer which are arranged on a train. The vehicle-mounted computer is connected with the force measuring sensor, the speed sensor, the acceleration sensor and thesatellite positioning unit. And the vehicle-mounted computer is used for calculating the total mass of the train body according to the real-time measurement data of the force measurement sensor, the speed sensor and the acceleration sensor, the longitude and latitude parameters of the train acquired by the satellite positioning unit and the preset train operation line track parameters in the vehicle-mounted computer and inputting the total mass into the train automatic driving system. The invention further provides a train body total mass measuring method. Before the train does not reach the maximum allowable speed, t